I use RadRails, and yes, you can add other cool Eclipse plugins. But to
add a cool plugin, you have to add not only the plugin itself but all
plugins on which it depends. I’ve successfully added WickedShell to
RadRails, but to do this I also had to swipe org.eclipse.pde and
org.eclipse.jdt from a standard Eclipse installation, and add these
plugins to the RadRails plugins directory.