Ja2BU is a question and answer script. It features SEO-friendly URLs and systems for private messaging, ratings, and comments.
phpBlogger is a microblogging system. It features search engine friendly URLs, templates using the Smarty PHP Template Engine, Google Adsense integration, advanced caching for high traffic sites, and Stop Forum Spam integration.
A lightweight alternative to Cygwin.
Pandora FMS is a monitoring system for big IT environments.