OpenACS. The Toolkit for Online Communities

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OpenACS 5.9.1 final released

We are proud to announce the release of OpenACS 5.9.1.

This release contains many security and performance improvements and includes new functionalities. The release of OpenACS 5.9.1 contains the 88 packages of the oacs-5-9 branch. These packages include the OpenACS core packages, the major application packages (e.g. most the ones used on, and DotLRN 2.9.1.

  • Refactoring of rich-text editor integration
  • Improved admin interface (e.g. theme manager), improved scalability for large sites
  • Improvements for "host-node mapped" subsites, acs-rels, status code handlers for AJAX, Internationalization, and documentation.

Altogether, OpenACS 5.9.1 differs from OpenACS 5.9.0 in about 312710 line insertions and 103273 deletions, contributed by 5 committers and 8 additional bug-fix submitters. All packages of the release were tested with PostgreSQL 9.6.* and Tcl 8.5.*.

Many thanks to all who helped in this effort via direct contributions, bug-reports or testing!

Release Announcement, ChangeLog, Download core, Download full

Published on Aug 08, 2017

What is OpenACS

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.

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Version 5.9.1 (openacs-5.9.1.tgz)
Available Versions
Install documentation

Generic installer
Windows Installation

Once the core system is installed, you can install packages from the OpenACS Package Repository.


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We are open to your contributions! If you have an idea, a new piece of documentation, or a patch, we want to hear about it!

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