- Subclipse (Update site for 1.6.x)
- WindowBuilder (Update site for Indigo)
- PyDev (Install site)
- Java Pathfinder Plugin (Update site)
- C++ Development Toolkit (Update site for Indigo)
- ANTLR IDE
Update: since Eclipse now has its own marketplace, finding a plugin is easier than before. So I will only list the plugin names without maintaining the update site links (some of them are already old).