Agilefant is a backlog management system that can be used when spreadsheets and most of the current issue tracking and project management systems meet their limits. It is intended to be used with agile methodologies that emphasize building releasable software in short, fixed time periods, where features are commonly managed using "backlogs".
ClockingIT is a complete multi-user Web based project management solution with a focus on handling large amounts of tasks during software development. It features an unlimited number of projects and tasks, tagging, email notifications, RSS and iCal feeds, time tracking, file uploads, reports, forums, and issue tracking.
Continuum is a continuous integration server. It makes sure that software always builds and works as expected. Continuous integration allows software projects to find and identify problems as soon as code is in the source control system. It currently supports building Apache Maven v1 and v2 projects.
Sputnik is a content management system (CMS) designed for extensibility. It works as a wiki out of the box, but can be extended into other things. It offers editable nodes, history and diff, user accounts with optional email validation, a flexible permission system, RSS feeds, and more. Sputnik supports access control and has editable templates. It can be used to maintain a personal Web site that doesn't look like a wiki and that only you can edit. Sputnik is easy to install on shared hosting without root accounts.
Devalot is a social networking application centered around software projects. It connects the user community with the development community and encourages participation and communication. It includes all the features you've come to expect in modern Web-based applications such as tagging, comments, and a wiki, as well as features you'd expect in project tracking software such as ticketing. It has features similar to some of those found in Trac, Collaboa, GForge, Mephisto, and Typo.
The Mylyn Connector for Origo integrates the Origo issue tracker into Eclipse. It features issue creation and editing directly inside Eclipse, task list integration with filtering support, rich editing features (including content assist for tags and a preview for wiki formatted text), support for custom queries (e.g. "my open bugs" or "wiki related bugs"), and issue change notifications. This is achieved by providing a connector for the extensible Mylyn framework.