Our friends at XOOPS China just ported flyspray , a web-based bug tracking system, to XOOPS

Features include:
– Web-based, platform-independent
– Multiple database support, currently MySQL and PGSQL
– Easy installation
– Easy to use
– Multiple projects
– ‘Watching’ tasks, with notification of changes (email or Jabber)
– Comprehensive task history
– File attachments
– CSS themes
– Advanced search features (though easy to use)
– Atom / RSS feeds
– Two syntax options for task descriptions and more (Dokuwiki / plain text)
– Voting for tasks
– Dependency graphs

Download: here

Demo: http://www.linux-ren.org/modules/flyspray/

Original info: here