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
All in One SEO Pack The most downloaded plugin for WordPress (almost 30 million downloads). Use All in One SEO Pack to automatically optimize your site for Search Engines
Total Downloads: 30M Download Plugin
Google XML Sitemaps This plugin will generate a special XML sitemap which will help search engines to better index your blog.
Total Downloads: 18.7M Download Plugin
W3 Total Cache Search Engine (SEO) & Performance Optimization (WPO) via caching. Integrated caching: CDN, Minify, Page, Object, Fragment, Database support.
Total Downloads: 6.5M Download Plugin
AddToAny Share Buttons Share buttons for WordPress including the AddToAny sharing button, Facebook, Twitter, Google+, Pinterest, WhatsApp, many more, and follow icons too.
Total Downloads: 5.4M Download Plugin
Redirection Redirection is a WordPress plugin to manage 301 redirections and keep track of 404 errors without requiring knowledge of Apache .htaccess files.
Total Downloads: 3.8M Download Plugin
EWWW Image Optimizer Reduce image sizes in WordPress including NextGEN, GRAND FlAGallery, FooGallery and more using lossless/lossy methods and image format conversion.
Total Downloads: 3.5M Download Plugin
NextScripts: Social Networks Auto-Poster Automatically publishes blogposts to profiles/pages/groups on Facebook, Twitter, Instagram, Google+, Pinterest, LinkedIn, Blogger, Tumblr ... 22 more
Total Downloads: 3.1M Download Plugin
ManageWP Worker ManageWP is the ultimate WordPress productivity tool, allowing you to efficiently manage your websites.
Total Downloads: 2.3M Download Plugin
SEO Ultimate This all-in-one SEO plugin gives you control over meta titles & descriptions, open graph, auto-linking, rich-snippets, 404 monitoring, siloing &am
Total Downloads: 2.1M Download Plugin
NextGEN Facebook - Social Meta Tags for Facebook, Google, Pinterest, Twitter & More Complete meta tags for the best looking shares on Facebook, Google, Pinterest, Twitter, etc - no matter how your webpage is shared!
Total Downloads: 2.1M Download Plugin
InfiniteWP Client Install this plugin on unlimited sites and manage them all from a central dashboard. This plugin communicates with your InfiniteWP Admin Panel.
Total Downloads: 1.9M Download Plugin
SEO by SQUIRRLYT SEO Plugin By Squirrly is for the NON-SEO experts. Get Excellent SEO with Better Content, Ranking and Analytics. For Both Humans and Search Bots.
Total Downloads: 1.7M Download Plugin
YouTube YouTube Embed WordPress Plugin. Embed a responsive video, YouTube channel gallery, or playlist gallery. Add thumbnails, analytics, caching...
Total Downloads: 1.7M Download Plugin
SEO Friendly Images SEO Friendly Images automatically adds alt and title attributes to all your images improving traffic from search engines.
Total Downloads: 1.7M Download Plugin
Xhanch - My Twitter The best plugin to display your latest tweets, replies, direct messages, retweets, auto and manual tweet and lots more. Support multiple accounts
Total Downloads: 1.6M Download Plugin
WordPress Related Posts WordPress Related Posts - the plugin for related posts with thumbnails. Caching included.
Total Downloads: 1.6M Download Plugin
WPSSO - Complete Meta Tags and Schema Markup for Social Sharing Optimization & SEO Automatically create complete and accurate meta tags and Schema markup for Social Sharing Optimization (SSO) and SEO.
Total Downloads: 1.6M Download Plugin
Custom Facebook Feed The Custom Facebook Feed allows you to display completely customizable Facebook feeds of any public Facebook page or group on your website
Total Downloads: 1.4M Download Plugin
Pretty Link Lite Shrink, beautify, track, manage and share any URL on or off of your WordPress website. Create links that look how you want using your own domain name!
Total Downloads: 1.3M Download Plugin
