piwik is a Web analytics software. It gives interesting reports on your Web site visitors, your popular pages, the search engine keywords they used, the languages they speak, and much more. It aims to be an alternative to Google Analytics.
jCore is a multi-site Web content management system. It includes support for e-commerce, photo/video galleries, polls, newsletters, and more.
OpenFootie is a text-based soccer match generation engine. It reproduces the match with statistics and reports. It is meant to be used as a library by integrating with host applications.
A Single Packet Authorization and Port Knocking implementation.
A basic image difference viewer.