VirtueMart is an Open Source eCommerce Solution for Joomla! The other carts claim to be easy to use. VirtueMart is not only as easy to use as Joomla!, but it was easy to install and looks very easy to comprehend and maintain.
AfterLogic WebMail Lite PHP is a free AJAX webmail application. Users can receive, view, manage, compose, and send email through web interface (IMAP and SMTP supported). Source code included.
Lurker is a mailing list archiver designed for capacity, speed, simplicity, and configurability in that order. Noteworthy features include: google-style searching on all fields, chronology preserving threads, multilingual, and attachment support.
pragmaMx is a content management system written in PHP
Open implementation of the notifier application for the danish youth community www.arto.dk . We are not affiliated with www.arto.dk in any way.
WPCleaner is a small portable tool designed to help on maintenance tasks (mainly disambiguation and check) on Wikipedia. Source code has been moved to github https://github.com/WPCleaner/wpcleaner
dnfBB is a powerful and fast 3 Tier, C# discussion board or forum for websites running ASP.NET. Native support for multiple forums within the same db structure. Designed to work with Firebird and MySQL, support for additional RDBMSs in the future.