Free openstar software for linux

OpenStar is a value-added PostNuke distribution. The aim of OpenStar project is to deliver a more complete eBusiness/CMS solution while still remaining compatible with the proven core PostNuke distribution.
OpenStar contains significant functional extensions and a powerful object-oriented development library, resulting in a significantly more complete CMS.
Main features:
- Calendar & AddressBook (integrated)
- Media & Content Mangement (integrated)
- Content Management Aggregator
- Project management (integrated with AddressBook)
- Document management
- Resource booking system (integrated with Media module)
- Powerful service module (bug tracker)
- Integrated HTTP(S) login into the system
- Lots of other additions and fixes to the base PostNuke codebase
Enhancements:
- This release contains almost 100 fixes and improvements, including the PN 0.762 security patch.
- If you are using a previous version of OpenStar, you are advised to upgrade to this release.
- The docs directory contains a list of changed files in case you wish to selectively upgrade your installation.
- If youve downloaded any 4.02 packages before 24-Feb-2006, you should download them again, as significant fixes have been applied.