OpenACS is a toolkit for building scalable, community-oriented web applications. OpenACS is the foundation for many products and websites, including the .LRN (pronounced "dot learn") e-learning platform.

OpenACS is open source and is available under the GNU General Public License.

Version 5.4.3 (openacs-5.4.3.tgz)
Install documentation

Ubuntu packages
Debian packages
Windows Installer

One of the strengths of the OpenACS project is the community surrounding it:

• Discussion forums
• #openacs channel in IRC at freenode.net (More info)
• Wiki
• File Storage

Resources for developers:

• Translation server
• Test servers
• Bug tracker
• Browse the CVS:
  • Using ViewVC
  • Using fisheye

AOE media GmbH: Open Source CMS provider in Germany.