
The applications comes with a few themes, makes notifications respond to clicks (unlike the Ubuntu build-in notifications) and you can change the notifications display time.
Download Mumbles (Ubuntu .deb and source files).
For a newer version, try the SVN:
svn co https://mumbles.svn.sourceforge.net/svnroot/mumbles/branches/backports0.4-branch mumbles0.4-branch
For plugins, visit Mumbles Extra
[via lifehacker]