Better Excerpt
Gives you full control over the WordPress excerpt: change the length, the ellipsis [...] and surrounding markup.
Twittify
Plugin simply turns Twitter @usernames and #hashtags into links to the related place on Twitter.
Development Notice
Adds a simple bar at the bottom of the site indicating that you’re working on a development version, so you don’t accidentally break the live site.
PHP Shortcode
Based on kukukuan’s Inline PHP plugin, this plugin allows you to embed and run PHP code in posts, pages or widgets with a WordPress shortcode.
SEO WPBooster
Designed especially for advertisement and SEO linkbuilding for blog posts of users registered in WPBooster system.
Get Shortlink
Places a button in your theme which allows visitors to grab the short URL for that page by copying the shortlink to their clipboard.
Rich Related Posts
The purpose of the plugin is to facilitate related posts functionality where posts can be enriched with groups of links to blog posts (or other sites).
wp-TrackbackPopup
The standard WordPress trackback link behavior does not provide users their expected result. wp-TrackbackPopup resolves this issue.
Image Gallery Reloaded
Automaticaly replaces the default WordPress gallery with a new gallery and slideshow.
Better Protected Pages
Improve password protected pages, with full control over CSS, wording and layout.