Downloads of releases are provided by SourceForge UNICORE project site:
For information on compatibility of various versions see this page.
You can access complete UVOS sources at UNICORE project SVN repository, hosted by SourceForge. The SVN link is:
https://unicore.svn.sourceforge.net/svnroot/unicore/uvos
To browse the sources using your web browser use the following link:
http://unicore.svn.sourceforge.net/viewvc/unicore/uvos/
Important note
Originally UVOS sources were hosted at the Chemomentum project SVN repository. The link is:
http://zam904.zam.kfa-juelich.de/svn/repo/chemomentum/uvos
At 2.06.2009, 15:00 CEST the sources were moved to the SourceForge. Therefore to see the detailed history of UVOS changes before this date check the Chemomentum repository. However note that tags (i.e. snapshots of releases) were also moved to SourceForge so are accessible there.