How to Add a Contact Form in Blogger Blog

Most of the blog don't have a contact form which is highly important for website or blog. Adding a contact form to Blogger can be done with a few coding tweaks. You can see contact form offered by Blogger in add a Gadget popup but unfortunately they've made it as a Gadget and placed it on the Layout page so that it is added to your sidebar. 

To add contact form in your blog follow the procedure. Login to your Blogger account and click on Pages > Blank Page. Create a new page in your blog with page title "Contact Us". 



You have to switch to the HTML mode and paste the following code and replace blogger ID (like 6655176397219971080) . You can find your blogger ID on the URL bar of your browser when you are on any page of blog's dashboard.  Now click on Options and disable Readers comments by tick on "Don't allow, Hide Existing" . 

Once the page is published, go to this new page fill out the contact form, click on the send button and verify that it sends out the email to all the Blog admins.


 

How to access your Router if You forget the Password

All routers have a built in web based setup page that allows you to configure their networking, parental control and port forwarding settings with a username and password. You have to change the default password of Router's settings to protect your WiFi or LAN connection.

If you don't know the default username and password of new router or if you acquired a used router and don't know its password, there are many ways to get or reset the password. 

How to find Default Username and Password of Your Router

To find the default username and password of router, follow these steps.

1. Router Manual : To locate the default username and password for the router, read its manual. If you lost the manual, You can find it by searching for your router's model number and manual on Google Search Engine. Keep in mind that different models of routers, even ones from the same manufacture have different username and password combinations.

2. Locate Sticker : some routers provided by your Internet service provider comes with unique password printed on stickers. Try to locate this sticker by looking at Router itself to change the settings of your router.

3. Hit and Trials Methods : Many routers use the username and password in the following combination like

Username : Leave it blank,    Password : Admin
Username : Admin,                 Password : Leave it blank
Username : Admin,                 Password : Admin

If these combinations doesn't work for you, try RouterPasswords.com to find the default username and password. Select the Router Manufacturer and click on Find Password, it will show a list of model no, Protocol, Username and Password.

Try to log in with the default credentials after finding them as it's possible that router was already reset or someone never changed its password. If these tricks don't work, try to reset the router to factory defaults.

To get router login page just enter the IP address of your router into a web browser. To find the IP address of your router, click on start menu > search box > type cmd and press enter. In the Command Prompt type ipconfig and press enter, look through the information and try to locate default gateway like this 192.168.1.1, this is the IP address of your router.

How to reset the Router to factory defaults

The reset button wiped away all the changes made to the routers like forwarded ports, network settings, parental controls and custom passwords. To reset the router to factory default, try to locate the reset button at the back side of router. 

To reset the router, you'll generally need to press this button and hold it down for about 10 seconds. After you release the button, the router will reset itself to the factory default settings and reboot. You can log into the router with its default username and password.

How to Use Hidden File Manager in Android 6

Google release its updates on Android OS known as Android 6 Marshmallow with better control over app permission, native fingerprint scanner support, improved power management, full access to a file system and support for removable SD cards. Google Android OS itself has never come with a built-in file manager and forcing manufacturers to create their own file manager apps, to install third party ones.

Android 6.0 now contains a hidden file manager and doesn't appears in the app drawer, as Google still wants to hide this features from most of the people. Google Android 6 file manager allows you to browse, delete, search, open, share, copy etc.

How to Access Android 6 Hidden File Manager 

To access the file manager, follow these steps:

• Open your Settings app.

• Tap on Storage and USB.

• At the bottom of the list, tap on Explore.

Also See : How to Manage Apps Permission on Android 6

You can also see the apps using space in internal memory like tapping "Apps" will show you a list of your installed apps with the largest apps first.

How to Use Android 6 Built-in File Manager

Android 6 actually presenting the file system same as the file system by third party file management apps with some limitations. You can't access the full root file system without a third party file manager and root permissions.

 1. Open files : Tap a file to open it in an associated app like you could tap Downloads to view your downloads and tap a PDF file to open it in your default PDF viewer.

2. Select Multiple Files : Long press a file or Folder to select it. Tap the Menu button after selecting a file and tap "Select All" to select all files in the current view.

3. Share files to an App : You could share files to Dropbox or Google Drive by selecting one or multiple files and upload them to a cloud storage service.

4. Delete Multiple Files : Tap the trash icon to delete one or multiple selected files.

Also See : How to Manage Apps Permission in Android Mobile or Tablet

5. Copying files : Tap the menu button and select "Copy to" move the selected files or folders to another folder from internal storage to SD card. 

6. Search for files : Tap the magnifying glass icon at the top right corner of the screen to search for files on your Android device storage.

7. List and Grid Views : Tap the menu button and select either "Grid View" or "List View" to toggle between the Android Views. 

8. Sort the files : Tap the sort button at the top right corner of the screen and select by Size, Date, Name etc.

 

How to Install Windows 10 in Laptop or PC

Microsoft Windows operating system is most popular in the world and they release a new operating system called Windows 10 in 2015. The windows 10 is already installed in approximately 15 million machines and keep increasing by the time. There are some ways to get Microsoft windows 10 for your PC like downloaded pirated version from torrent, buy Windows 10 DVD or upgrade your current system to Windows 10. 

In this tutorial, I will show how to do a clean install of Windows 10 in Laptop or PC. Before you decide to upgrade your computer, we highly recommend to create a system image of your entire computer to easily revert back. 

How to Install Windows 10

1. Download the Windows 10 ISO image from Microsoft's website.

2. You have to either burn it into DVD to make bootable or use USB Flash drive to install windows 10.


3. To start process,  put Windows 10 DVD in DVD ROM and restart your computer or Laptop or insert  Pen drive to USB port. 

4. When you first boot the Computer or Laptop, you will see the screen like this.  Now Click Next > Install Now > Custom install Windows only.
 

At this point you need to select the drive to install Windows 10. If your computer already have Windows 7 or 8 installed in your PC or Laptop, search for the drive containing Windows and click on format. After formatting this drive click on Next and it start the process. 

If you are installing Windows 10 in New PC or Laptop, create the partition of your Drive by click on New and choose the size of Drive. You are allowed to create 4 partition in your Windows Hard disk.  

5. Once the PC reboots again, you'll be able to select the settings like PC Name, Express settings, Date and Time. Now you can sing into your Microsoft account. 

6. You'll be asked how to setup the PC, click on set this up as a new PC instead and click on next until you see a desktop in Your PC or Laptop.

Video : How to Install Windows 10

If you have any problem regarding installing Windows 10 in your Laptop or PC, write in comment box below.

How to Use Offline Maps on iOS, Android, Windows, Linux

If you are traveling to a new place, where their is no internet connection or mobile data is too expensive. In this case, either you can ask someone for the unknown place to reach your destination  or having a offline maps on your Mobile, Laptop is smart move.  

You can save a offline map to your device and uses it when you're offline. 

How to Use Google Maps on iOS and Android

To use Google Maps offline on both iOS and Android, visit App Store on your iOS device, or the Play Store on your Android device and check for any available updates for Google Maps.

Launch Google Maps on your device and search for the area you'd like to save for offline use. Now click on the three dot icon in the top right corner of your screen to save offline map of respective area. There are some limitation on Google Maps, you can save area less than 50km x 50km and not able to use navigation on offline mode. 


To overcome Google Maps limitation, You can also use Here Maps by Nokia, Download and install it on your Windows Phone,  iOS and Android device. After installing to your respective device, navigate to download Maps and choose city or country name to start download.

  

Use Offline Maps on Linux, Windows and Mac OS

GMapCatcher is an offline maps viewer and display maps from many providers such as OpenStreetMap, Yahoo Maps, Bing Maps, Nokia Maps, SkyVector etc.

If you have some other methods for offline maps, tell us by commenting below.

How to Prevent and Remove Browser Hijackers from PC

Browser hijacker is a type of malware program that modifies a web browsers settings without a user's permission, to inject unwanted advertising in the browser. A browser hijacker replace default browser home page and search page to generate traffic and revenue. These are generally used to force to hit a particular website to create online traffic and increasing its advertising revenue. Some browser hijacker install a software called keylogger to gather information such as banking, email username and password. They also damage the Windows registry and your computer didn't work properly or not functional anymore. When you install a pirated software or third party software to your computer, laptop or Mac, their also some program in the software which install automatically with no uninstall options. 

To avoid contamination with Browser hijackers, I recommended you to read user agreements carefully while installing third party software, toolbar, pirated software etc. 

Prevent and Remove Browser Hijacking from PC

There are thousands of browsers hijackers present on the internet such as Astromenda, Ask toolbar, Binkiland, Delta and Claro, Vosteran, TV Wizard, Taplika, SourceForge Installer, Snap.do, Searchnu.com, Searchgol.com, Searchult.com, Search-daily.com, Searchassist, RocketTab, Onewebsearch, MyStart.IncrediBar Search, Mixi.DJ, istartsurf, GoSave, Coupon Server, CoolWebSearch, Conduit Search, Babylon Toolbar, Dregol, Jamenize, Mindspark, Groovorio, Sweet Page, Trovi, Tuvaro, Spigot etc. 

1. Remove Potentially Unwanted Programs : To uninstall a potentially unwanted program, Click on Windows Start Menu > Control Panel > Add or Remove a Program. Here is a list of program listed on your computer, search for suspicious and unwanted program in the list. Once the program is located, click on uninstall/change to begin process. 

2. Remove Unwanted Browsers Add on or extension : Follow these steps to remove unwanted browsers add on from Chrome, Firefox, and Internet Explorer.
 

• Google Chrome : Click on Chrome Menu > Settings > Select Extension and find the unwanted add on or extension. Click on the trash icon to delete the extension and restart browser.

• Mozilla Firefox : click the Menu button > Add-ons > select Extension panel and remove all unwanted add ons from list, restart browser.

• Internet Explorer : Open IE, Click on Tools > Manage Add on and find unwanted or suspicious add on. Click on add on to remove or disable and restart your browser.

3. Remove Browsers Hijacker from Search Engine : To remove browser hijacker from search engine from chrome, Firefox, Internet Explorer follow these steps given below.

• Mozilla Firefox : Navigate to Firefox Menu > Options > Search and click on unwanted search engine to remove from list. 

• Google Chrome : click on Chrome Menu > Settings > Search > Manage Search Engine and click on search engine to remove from list.

• Internet Explorer : Open IE > Tools > Manage Add on > Search Providers and remove a unwanted search engine from the list. 

4. Remove Browsers Hijacker from Homepage : You must remove browser hijacker from homepage to change your browser homepage from Chrome, Firefox, Internet Explorer.

Also See : How to Change Browser's Home Page

5. Use Anti Malware Software : Download and install the free version of Malwarebytes Anti Malware to scan your computer. When the malware scan is complete, click on the button Quarantine All to isolate and remove the suspicious files. Reboot your computer to completely remove detected files.

You can also use HitmanPro to eradicate existing malicious files and automatically repair corrupted settings.

6. Clean Up and Repair Settings : Download and install free version of CCleaner by Piriform and navigate to Cleaner > Windows/Applications and click the Analyze button, after this click the Run Cleaner. 

Next, navigate to Tools > Startup and search for suspicious entries through each tab starting from Windows, Internet Explorer, etc., all the way to Context Menu and click Disable and Delete once anything you do not recognize is found. 

How to Manage App Permissions on Android 6.0

Google updates it Android version 6.0 called Marshmallow which include a new app permission system. In the previous version of Android, you can't revoke app permission from any app. With the updated version of Android 6.0, you can manually revoke app permission. You don't need to root, use third party software to revoke app permission.

In Android 6.0 Marshmallow, the users can deny specific app permission and they are allowed to manage app permissions individually. 

How to Manage App Permission on Android 6.0 

To see permissions for individual application, Go to settings > Apps to see a list of all the apps installed on your Android device. Tap one of the app in the list to view more information, You'll see a Permission category that lists all the permissions that individual app has access to.  Just turn off the permission you don't want to gain access.

There are different categories of app permission like Contacts, Camera, Location, Microphone, Phone, SMS and Storage. When you revoking permissions from any application, you'll see a warning message like "This app was designed for an older version of Android. Denying permission may cause it to no longer function as intended".

Note : An App update create a new sub permission without asking you again. For example, even if an app only uses the “read phone status and identity” permission in the Phone category and you choose to allow “Phone” access, a future update to the app could add the “Directly call phone numbers; this may cost you money,” and “Reroute outgoing calls” permissions. As these are part of the “Phone” category, the app would be allowed to use them without any additional prompts, as you’ve allowed that “Phone” access.  Here’s a list of permission groups and more information on Google’s website.

How to Manage App Permission on Android Mobile or Tablet

Google's Android operating system has a very powerful app permission system that force app developers to mention the exact permission they require but there are many security holes for Android users. When you download apps from Google Play Store and install it in your mobile phone, the application needs some permissions like make phone calls, Browsing history, Contacts, SMS, Photos, calendar and even more. Do you ever think that it is really necessary to give all permission to Android apps. To install apps you need to accept all their permission to run application in your mobile even this personal information can seen by third parties without your knowledge. 

Google Play Store contains lots of apps which need unnecessary permission while installing in mobile or tablet. 
When you install a game in android like Kaizin Rumble : World Domination, the following permission are required to play it.

Storage : Modify or delete the contents of your USB storage
Your Application Information : Retrieve running apps
Network Communication : Full network access
Phone Calls : Read phone status and identity
Your Social information : Read call logs, read your contacts
Your Account : Add or remove accounts, use accounts on the device. 

How to Manage App Permission on Android

You can control each single permission you grant to an app by using some third party application. There are many apps like App Ops, X Privacy which require a rooted Android mobile phone to manage App permission. 

To manage apps permission without root your Android device by using third party application. First you need to Download and install Mobo Clean ( also known as UU AppPurifier ) to your mobile or tablet.

Launch the app and Click on agree button after reading license agreement. Click on Purify button to view all your installed apps. Using this menu, select any app whose permissions you'd like to revoke or remove and press the Purify button at the bottom of the screen. 

After it a screen may appear "Do you want to uninstall this app?", click OK and immediately after this process another system menu will appear asking you to re-install this app and click on install. When the Purify process complete, simply select an app to modify its permissions.

You can also use Advanced Permission Manager to revoke app permission on Android

If you like this Article share with your friends on any social media platform like Facebook, Twitter. 

How to Download YouTube videos Without any Software

YouTube is best video service online with approximately 4 billion video watches in a single day. YouTube is designed to watch and share video online without having download option. Many users want to download or save their favorite video in their computer so they can watch them without connected to internet.  If you watch a video online and want to download it, like other YouTube user you have to download a YouTube video downloader and install it in you PC.  

I want to discuss some simple tricks to download YouTube video without installing any software to your PC or Laptop.

You can download YouTube video by using some other websites. Visit YouTube and click on video you want to download. Add any of these word  ss,  pwn, between www and youtube something like this.

Before : https://www.youtube.com/watch?v=4xpb6L-C98U

After : https://www.ssyoutube.com/watch?v=4xpb6L-C98U
            https://www.pwnyoutube.com/watch?v=4xpb6L-C98U

It will redirect you to new page, choose YouTube video format like MP4, MP3 and HD 720p. 

If the above methods don't work try these websites ClipConvertier, CatchVideo, KeepVid,  to download YouTube videos. Copy and paste video url to begin download in any format.

Do you have some more methods to download YouTube videos without any software. Leave a comment below......

How to Use Alt tags in Blogger images

Most common mistake done by many blogger is that they forget to put alt tag in images due to which loss of organic traffic. Do you know alt tag is very important in Google Blogger to increase blog ranking and organic traffic. You don't have any plugin in blogger like WordPress plugin in order to get alt tag in images. 

Alt tag is a part of Search Engine Optimization (SEO) and Google image search tool is most popular service to find images, graphics and icons from all around the Web. In order to get more organic traffic from Google search engine always use atleast one image in your blog post with proper alt tag. 

How to Use Alt tag in Blogger

Login to your blogger account and click on post. You can either upload a fresh image for New post or use existing image in the Published post. Click on image > Properties. It will open a pop up with image properties like Title text and Alt text. 

  Add the Title text and Alt text related to your Post, for example if you writing a Post about How to download torrent directly, Just use Download torrent directly in Title text and How to download torrent directly in Alt text. 

Note : Don't use special characters like @, $, %, &, *, ^, ! and more than 15 words in  Alt text and Title text.

There is another method to add Alt text in blogger. To do so, click on post > html view > Press Ctrl + F. Now find img and add alt="image keyword" after it. Replace image keyword with alt text .  To add Title text, find title and replace image title with Title text something like this. 

Also See : Best Methods to Remove Powered by Blogger


<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjeHv2G16DQbmxXLSysff5VRLcxNBgKB157d43RjzzDBv49FgHjj8cx4Gxpph1otlny3ovMYJolk9O3ycjetBAo25Griz-uB6HLAVapfma-4rbzzYQrQwB_aWDp90_uXJZCc2a-jDJ5v2i9/s1600/How+to+Stop+Videos+Playing+Automatically+on+Facebook.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img alt="image keyword" border="0" height="312" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjeHv2G16DQbmxXLSysff5VRLcxNBgKB157d43RjzzDBv49FgHjj8cx4Gxpph1otlny3ovMYJolk9O3ycjetBAo25Griz-uB6HLAVapfma-4rbzzYQrQwB_aWDp90_uXJZCc2a-jDJ5v2i9/s640/How+to+Stop+Videos+Playing+Automatically+on+Facebook.jpg" title="image title" width="640" /></a> 


 
If you have any other methods to use Alt text in blogger, lets us know by commenting below. 

How to Backup and Restore WhatsApp Chats, Media using Google Drive

WhatsApp is one of the best message app available for iPhone, BlackBerry, Android, Windows Phone and Nokia with more than 900 millions users all over the world. WhatsApp added a new feature which allows you to automatically create a backup of your Message, Voice message, Photos and videos to Google Drive. If you lose your phone or switch to another Android phone, Your WhatsApp data are safe and restored in a few clicks.

Also See : How to Use WhatsApp on PC or Laptop

                  How to Expand Your Phone Storage with Wireless USB stick
Before using Google Drive backup make sure that you have the following things.

1. A activated Google Account.
2. Enough free Google Drive space for your WhatsApp chats and media.
3. Free space on your phone to create the backup.

How to create a Google Drive backup

Download the WhatsApp version 2.12.303 and open it. Go to Settings > Chats and calls > Chat backup > select Google Drive backup > select the frequency for backup. You will need to select Gmail account you are using for the backup. Tap on the Back up over to choose the network you wish to use for backup. I recommend you to use Wi-Fi connection for this purpose.

Also See : Best Android Apps to Backup and Restore Data

How to restore WhatsApp backup from Google Drive

Make sure that you uses the same phone number and Google account used to create the backup to restore WhatsApp chats and media. The restore process is simple, you need to install WhatsApp on your new device and verify Your mobile number and enter email address. After verifying your number, you will be prompted to restore your message and media from Google Drive. 

Also See : How to install Apps directly into Your SD card
 
Note : You can also delete your old WhatsApp files from Google Drive to save disk space. Go to Google Drive and login to your account. Click on the Gear icon in the top right > Settings > Manage Apps. Scroll down to find WhatsApp in the list and click on Options > Delete hidden app data.

How to Choose Great Domain Name for Your Business

When you start a website, blog or business online, first thing you consider to start is choosing best domain name. Your domain name is your identity on the web. When you are choosing a domain name is similar to choosing a company name, it require a lot of thought and consideration. There are some thumb rule to decide a domain name which matches your business perfectly. 

There are three most commonly used domain extension i.e. .com, .net and .org and try to get .com as your first choice. Choose the domain name which match with your brand or company name. If your company name is something like Soylaer Ltd, You can opt for Soylaer.com or Soylaerinfo.com (subject to availability). 

1. Easy to Type : Choose a domain name that's easy to type and avoid use of slang (u instead of You) or words with multiple spellings i.e. express vs xpress.

2. Short Length : short and simple domain name is smart choice but if your domain name is long and complex, you risk visitors mistyping or misspelling it.

3. Keywords : You can choose random keywords that describe your business and the service you offer. Select atleast 10 keywords that are related to your business or niche and 5 random popular words. You can use bustaname online service to find domain names by entering keywords. It will give you a list of all the available domain names. 

Also see : Best WordPress Hosting Providers

4. Avoid Numbers and Hyphens : You should avoid use of numbers and hyphens in domain name as they misunderstand people who hear your domain name. sometime people suggest that you should choose a domain name according to your blog's niche but it is not great advice for bloggers who are looking for domain name with words like blog, tech and tips in them. There are thousands of blogs and websites already on the internet using similar names like techtip, techblog, bloggertips and so on.

5. Domain Name Extension : All the domain name extension have specific uses, so make sure to choose one that works for your business. For business .COM extension is most popular and here are list of some other top extensions.

.co : an abbreviation for company, commerce, and community
.info : informational sites
.net : technical, Internet infrastructure sites
.org : non-commercial organizations and non-profits
.biz : business or commercial use, like eCommerce sites
.me : blogs, resumes or personal sites

6. Easy to Remember : Can you remember domain name like this thoosaattz.com and how to spell it. I suggest to choose a domain name which is easy to remember and type. 

Also See : Most Essential WordPress Plugins

Buy Domain Name : You can buy domain name from any of these domain registrars.

BigRock : $9.82 (Use coupon "baatkar.com" to get 25% discount).
 
NameCheap : $10.69

 Feel free to leave a comment below.

Most Essential WordPress Plugins

There are approximately 40,000 WordPress plugin and it can be difficult to sorting good from the well. Choosing the best plugin for your WordPress site will help to make your day-to-day life easier and deliver a better experience for valuable user as well.

Here are the best WordPress plugins that will add new functionality to your WordPress site. These all are free and open source plugins and you can download them from the official website.

When you use any plugin for the first time or just updated to major version, make a backup of your database. It is always the best practice to make a database backup before using any plugin for first time.

1. W3 Total Cache : Best caching plug-in for WordPress and it will improve your site page speed. It lets you to minify scripts, cache database queries, add expiry headers to static images and more. It also reduced page load time, increase visitor time on site and visitors view more pages.

2. Yoast SEO : It helps you to create better titles, block duplicate pages from search bots, add meta tags required for more search friendly Google snippets. It also integrate Twitter Title Tags and Facebook open Graph tags. 

3. Redirection : It manage 301 redirections and keep track of 404 errors without requiring knowledge of Apache .htaccess files. If the URL of an existing post has changed or if an external site is linking to a non existing page on your site, You can create redirection rules and automatically forward all the incoming traffic to the right pages. There is an good alternative for redirection, known as Simple 301.

4. WP Optimize : It helps you to clean up WordPress database tables and optimize it without doing manual queries, also remove post revisions, trash spam comments. It optimize your MySQL tables so that it works more efficiently and consumes less space.

5. Adminer : It helps you to manage your MySQL database from the WordPress dashboard itself. Adminer is a full-featured MySQL management tool written in PHP. You can perform database optimization, run SQL queries and browse tables.

6. Search Regex : This adds extremely powerful search and replace capabilities to your blog. You can find and replace almost any kind of data stored on your WordPress site including Meta data, post titles, comments and excerpts. 

7. SlideShare : You can install this plugin to easily embed SlideShare presentations in blog posts with the help of short codes. This may be optional as WordPress core itself supports SlideShare embed.

8. Smart YouTube : It lets you embed YouTube videos in blog posts using standard video URLs and the embedded player can be customized. You can also embed Vimeo, Metacafe, Liveleak and Facebook videos and play in normal and HD mode. It adds a thumbnail of the embedded video in the RSS feed.

9. Yet Another Related Posts Plugin (YARPP): This plugin adds links to old stories that may be contextually related to the content of the current article. It also helps expose your archived content to search bots and display related posts in RSS feeds with custom display options.

10. Authenticator : Enable 2-step authentication for your WordPress blog, similar to your Gmail account.  

11. WP DBManager : It Allows you to optimize database, repair database, backup database, restore database, delete backup database , drop/empty tables and run selected queries. Supports automatic scheduling of backing up, optimizing and repairing of database.

12. Debug Queries : Use the Debug Queries plugin to determine which MySQL queries are taking more time to execute and thus slowing down the blog. 

13. P3 Profiler : This plugin creates a profile of your WordPress site's plugins performance by measuring the impact on your site's load time. Many times, WordPress sites load slowly because of poorly configured plugins or use of many of them. P3 Profiler generate a pie chart detailing the time it takes to run each plugin while loading the various pages of your site.

14. Google XML Sitemaps: This plugin will generate a special XML sitemap which will help search engines like Google, Bing, Yahoo and Ask.com to better index your blog. 

15. Pubsubhubbub : When you publish a blog post, it will instantly ping Google and send a strong signal to the search engine that you are the original author. This plugin is widely adopted and is used by Google Reader, Google Alerts and many other services.

16. Limit Login Attempts : This plugin logs the IP address and the exact date and time when a user is trying to log into your WordPress and keeps tracks of unsuccessful login attempts. You can automatically lock out users after they have made ‘n’ unsuccessful login attempts.

17. Akismet : This plugin checks your comments against the Akismet Web service to see if they look like spam or not. Each comment has a status history, so you can easily see which comments were caught or cleared by Akismet and which were spammed or unspammed by a moderator.

18. Contact Form 7 : It can manage multiple contact forms and support customization. No need of coding with the Contact Form 7, as the forma and mail contents can be easily customized through the settings. The form supports Ajax-powered submitting, CAPTCHA and Akismet spam filtering. 

Comment below if  any other most essential WordPress plugins which is not listed here.