WP-Optimize is a WordPress 2.9++ database cleanup and optimization tool. It doesn't require PhpMyAdmin to optimize your database tables.
It allows you to remove post revisions, comments in the spam queue, un-approved comments within few clicks.
Yahoo's excellent Exceptional Performance series recommends optimizing images in several lossless ways:
stripping meta data from JPEGs
optimizing JPEG compression
converting certain GIFs to indexed PNGs
stripping the un-used colours from indexed images
Smush.it offers an API that performs these optimizations (except for stripping JPEG meta data) automatically, and this plugin seamlessly integrates Smush.it with WordPress.
The most complete WordPress performance framework.
Recommended by web hosts like: MediaTemple, Host Gator, Page.ly and WP Engine and countless more.
Trusted by countless sites like: stevesouders.com, mattcutts.com, mashable.com, smashingmagazine.com, makeuseof.com, yoast.com, kiss925.com, pearsonified.com, lockergnome.com, johnchow.com, ilovetypography.com, webdesignerdepot.com, css-tricks.com and tens of thousands of others.
W3 Total Cache improves the user experience of your site by improving your server performance, caching every aspect of your site, reducing the download times and providing transparent content delivery network (CDN) integration.
Buffer makes it super easy to share any page you're reading. Keep your Buffer topped up and we automagically share them for you through the day.
This plugin is written from the ground up by WordPress SEO consultant and WordPress developer Joost de Valk to improve your site's SEO on all needed aspects.
WPtouch automatically transforms your WordPress website for mobile devices, complete with ajax loading articles and smooth effects when viewed from popular mobile web browsing devices like the iPhone, iPod touch, Android mobile phones, BlackBerry OS6+ mobile devices, and more!
Yet Another Related Posts Plugin (YARPP) gives you a list of posts and/or pages related to the current entry, introducing the reader to other relevant content on your site.
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. With such a sitemap, it's much easier for the crawlers to see the complete structure of your site and retrieve it more efficiently. The plugin supports all kinds of WordPress generated pages as well as custom URLs. Additionally it notifies all major search engines every time you create a post about the new content.
Akismet checks your comments against the Akismet web service to see if they look like spam or not and lets you review the spam it catches under your blog's "Comments" admin screen.
Disqus, pronounced "discuss", is a service and tool for web comments and discussions. Disqus makes commenting easier and more interactive, while connecting websites and commenters across a thriving discussion community.
The Disqus for WordPress plugin seamlessly integrates using the Disqus API and by syncing with WordPress comments.
oogle Analyticator is back! Google Analyticator adds the necessary JavaScript code to enable Google Analytics logging on any WordPress blog. This eliminates the need to edit your template code to begin logging. Google Analyticator also includes several widgets for displaying Analytics data in the admin and on your blog.
Developed at NCI. The Social Media Icons Widget is a basic sidebar widget that displays icon links for the user's social media profile URLs. The widget includes 28 different freeware icon sets with different combinations of icons. The default icon set features all the icon types found in the other icon sets. It is also possible to create custom icon sets by adding a folder with the icons you want to appear in your sidebar.
