A quick update for Jupiter users: Jupiter 0.1.2 has been released and it now uses Python by default instead of C#. The latest Jupiter comes with an Ubuntu AppIndicator as well as a notification area applet for those who don't use Ubuntu, so there's no need to use PyJupiter anymore.
The new version also brings support Glidepoint touchpads and bug fixes.
|Jupiter in Fuduntu (Tray applet)|
If you're using the WebUpd8 PPA and have either PyJupiter or Jupiter installed, there's no need to remove any packages, just run a regular update (dist-upgrade may be needed if you run it from the command line) and you should get the new Jupiter 0.1.2. The "pyjupiter" package is now a metapackage so you can remove it if you want.
To install Jupiter in Ubuntu 12.04, 11.10, 11.04 or 10.10, use the commands below:
sudo add-apt-repository ppa:webupd8team/jupiter sudo apt-get update sudo apt-get install jupiter
The latest Jupiter 0.1.2 is also available as a RPM: download.
For other Linux distributions, you can get the Jupiter source via SourceForge.
second screenshot via Fewt