Patchy extends the Mantis bug tracking system to allow users to submit patches which are then autotested before being queued for approval. Please download, try the live demo (Home Page link above), join the announce mailing list for updates or help code!
Tracker is a vendor neutral defect tracking tool designed for medium to large scale IT projects. It can also be used as a ticketing system for support helpdesks and to manage both team and individual work queues.