Eclipse "Juno" has been released and with that the first stable version of the Eclipse 4 SDK.
Features of the Eclipse Juno development platform include the Eclipse 4.2 IDE as the first stable Eclipse 4 SDK release, Code Recommenders as a way to make code completion much smarter, Eclipse Virgo as a new nano kernel for building small OSGi applications, Koneki as a Lua IDE, and other new packages.
More information on the Eclipse Juno release train for 2012 is detailed in
this Eclipse.org press release.