We just published the feature-complete release candidate for the upcoming version 0.9. After adding some neat new features in 0.9-beta we now stabilized the code for the final release.
Download it from http://roundcube.net/download and please report remaining bugs to our bug tracker.
Source: http://sourceforge.net/news/?group_id=139281&id=310396
Get it Now: http://roundcube.net/download