Well most of them at least, I’ll try to keep this list updated:
- WTP project : for developping web and enterprise applications, also includes xml validation etc
- TPTP project : for testing and profiling applications
- green : for UML integration
- SQL explorer : database management through jdbc
- PHPeclipse : php integration
- m2eclipse : maven integration, there is also an maven plugin for generating eclipse projects
- RDT : ruby integration