GoatTracker - This is a crossplatform C64 music editor.
Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
OnlineSequencer.net - OnlineSequencer.net is an online music sequencer that allows users to create beats and music tracks.
Anchor CMS - Free and lightweight blogging system
Jummbox - A modified Beepbox that have more stuff then Beepbox. It can be used just like Beepbox. The features of Jummbox is the same of Beepbox's features, but Jummbox have more stuff to offer.
Textpattern - Textpattern is an elegant content management system that is free, open source software.