This plugin is great to show related posts. It doesn’t need much performance and works absolutely reliable.
The fastest and most complete WordPress performance plugin. Dramatically improve the speed and user experience of your site.
GD Star Rating is advanced and feature packed plugin for setting up rating system on your WordPress blog. Plugin allows you to set up different rating systems for posts, pages and comments with great degree of customization.
List of features is very, very long, and you can check it out on the page on the right, or better yet go to the official website. Plugin will still remain free and there is no intention for that to change. But, support terms are changed and here you can find more info on that.
Sometimes you just need a basic widget that isn’t all packed with crazy options and included files. This plugin comes packaged as basic as you can get with no bells and whistles or anything useless. Just the bare essentials for doing what you need to do.
Now you can display your latest Twitter updates in your sidebar, and not have a ton of overhead or extra stuff slowing your site down.
Provides an easy to use interface to create and administer custom post types and taxonomies in WordPress.
Event Espresso is a premium event manager carefully brewed for your WordPress blog/CMS. This premium plugin for WordPress allows you to turn your existing blog or website into a fully featured event management website.
NextGEN Gallery is a full integrated Image Gallery plugin for WordPress with a slideshow option.
WP-to-Twitter is an awsome WordPress-Plugin, which allows you to submit a shortmessage for every new Post you´ve submitted so far. You can configurate the URL-Shortening-Service and get a lot of new Users from the Social-Network Twitter.