EasyEclipse for Plugins and RCP Apps 1.3Free
This distro contains the all you need to develop applications reusing the Eclipse architecture: both to develop Eclipse plug-ins, and to develop RCP applications, i.e. applications reusing components from Eclipse. In particular, it contains all the source code for the Eclipse platform and tools, which allows you to easily browse and debug the Eclipse code when accessed from your application.
-Free and open-source,
-Easy to download and install, and
-Simple to maintain, without version and dependency issues.