Wordpress Plugins 
Mozilla Firefox Addons 
Google chrome Extensions 
Yoast SEO Improve your WordPress SEO: Write better content and have a fully optimized WordPress site using Yoast SEO plugin.
Total Downloads: 34M Download Plugin
Google Analytics by MonsterInsights Connect Google Analytics with WordPress by adding your Google Analytics tracking code. Get the stats that matter.
Total Downloads: 12.1M Download Plugin
Total Downloads: 3.8M Download Plugin
Disqus Comment System The Disqus comment system replaces your WordPress comment system with your comments hosted and powered by Disqus.
Total Downloads: 2.4M Download Plugin
WP-Polls Adds an AJAX poll system to your WordPress blog. You can also easily add a poll into your WordPress's blog post/page.
Total Downloads: 2.3M Download Plugin
All-in-One Event Calendar A calendar system with many views, upcoming events widget, color-coded categories, recurrence, and import/export of .ics feeds.
Total Downloads: 1.7M Download Plugin
Events Manager Fully featured event registration management including recurring events, locations management, calendar, Google map integration, booking management
Total Downloads: 1.6M Download Plugin
All In One Favicon Easily add a Favicon to your site and the WordPress admin pages. Complete with upload functionality. Supports all three Favicon types (ico,png,gif).
Total Downloads: 784.7K Download Plugin
Form Builder Form Builder is an intuitive tool for creating contact forms rearranging and editing fields.
Total Downloads: 705.9K Download Plugin
Total Downloads: 704.5K Download Plugin
Easy Plugin for AdSense Easy Plugin for AdSense manages all aspects of AdSense: insert ads into posts and sidebar, and add a Google Search box. Easiest and most complete AdSe
Total Downloads: 684.5K Download Plugin
Child Theme Configurator When using the Customizer is not enough - Create a child theme from your installed themes and customize styles, templates, functions and more.
Total Downloads: 677.3K Download Plugin
Booking Calendar Booking Calendar plugin - is the ultimate booking system for online reservation and availability checking service for your site.
Total Downloads: 656.7K Download Plugin
Header and Footer Header and Footer plugin let you to add html code to the head and footer sections of your blog... and more!
Total Downloads: 644.7K Download Plugin
Shadowbox JS Shadowbox is an online media vieiwing application similar to Lightbox and Thickbox but with more functionality. Supports all types of media.
Total Downloads: 518.7K Download Plugin
Chartbeat The Chartbeat plugin automatically adds real-time data and a top pages widget to your blog. See who's on your site, what they're doing - right now
Total Downloads: 496K Download Plugin
Hupso Share Buttons for Twitter, Facebook & Google+ Help share your posts on popular social networks: Twitter, Facebook, Google+, Linkedin, Pinterest, StumbleUpon, Tumblr, Reddit, Bebo and others.
Total Downloads: 484.3K Download Plugin
Imsanity Imsanity automatically resizes huge image uploads. Are contributors uploading huge photos? Tired of manually scaling? Imsanity to the rescue!
Total Downloads: 458.9K Download Plugin