Here are the most downloaded Wordpress plugins. These most popular Wordpress plugins are downloaded a lot simply because they are very useful, easy to setup and use.
Injects any adverts (e.g. AdSense) into the WordPress posts or widget area. Restrict who sees ads by post length/age/referrer or IP.
Display real-time Twitter feeds on your website. Update your website visitors with your latest Tweets.
Spice up your navigation menus with pretty icons, easily.
Show or hide widgets on specific posts, pages or sections of your site.
(OFFICIAL tawk.to plugin) Instantly chat with visitors on your website with the free tawk.to chat widget. Website: http://tawk.to
The Ultimate Adsense / Ad-Management Plugin for Wordpress
Official Twitter, Periscope, and Vine plugin for WordPress. Embed content and grow your audience. Requires PHP 5.4 or greater.
Edit the permalink of custom post type.
[pagelist], [subpages], [siblings] and [pagelist_ext] shortcodes
Twitter for WordPress displays yours latest tweets in your WordPress blog.