If you are an Eclipse and Arduino fan you should definitively try this project. On April 1 V3 will be released but stable downloads are already available from the nightly section.
"With the release of version 3 of the Eclipse Arduino product, nicknamed "Toddler", Project Lead Jan Baeyens brings us the next big step in professional development for the open hardware Arduino platform. The major features of this release are single install, auto library include and an incredibly good integrated serial monitor."
Stable nightly downloads are here 
Source code is here