OpenACS. The Toolkit for Online Communities

22063 Community Members, 0 members online, 2669 visitors today

NewsSubscribe via RSS

Schedule and Slides from the OpenACS and Tcl / Tk Conference 2024

The schedule and slides from the OpenACS and Tcl/Tk Conference 2024 are now available!

Published on Jul 15, 2024

OpenACS 5.10.0 final released

We are proud to announce the release of the OpenACS 5.10.0 [1]. This release contains the most changes in OpenACS between releases in history, including many security and performance improvements, and includes new functionalities. This new release differs from OpenACS 5.9.1 by the following statistics
3445 files changed, 215464 insertions(+), 193642 deletions(-)

The release of OpenACS 5.10.0 contains the 93 packages of the oacs-5-10 branch (plus 9 compared to oacs-5-9). These packages include the OpenACS core packages, the major application packages (e.g. most the ones used on, and DotLRN 2.10.0. The release contains several security improvements and new functions, several new packages were added, and 370 bugs noted in the bug tracker have been fixed (plus many more not noted there).

For a partial summary of changes, please check the release notes [2], for the more detailed list of changes since the release of OpenACS 5.9.1, see [3]. Many changes/enhancements of the application packages are just contained in the detailed changelog.

These changes were contributed by 7 committers ...

  • Antonio Pisano
  • Gustaf Neumann
  • Günter Ernst
  • Hector Romojaro
  • Michael Aram
  • Stefan Sobernig
  • Thomas Renner

... and additional 13 patch/bugfix providers

  • Felix Mödritscher
  • Florian Mosböck
  • Frank Bergmann
  • Franz Penz
  • Hanifa Hasan
  • Keith Paskett
  • Markus Moser
  • Maurizio Martignano
  • Monika Andergassen
  • Nathan Coulter
  • Rainer Bachleitner
  • Stephan Adelsberger
  • Tony Kirkham

All packages of the release were tested with PostgreSQL 13.* and Tcl 8.6.*.


Published on Sep 15, 2021

Recent Announcements

Recent Discussions

OpenACS Development

Recent Bug Fixes

  • Issues entered into the OpenACS bug tracker during last year: 1 (resolved 1)
  • Issues from bug tracker fixed during last year: 2
  • Issues from bug tracker fixed since last release: 391

What is OpenACS

OpenACS is an open-source 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.

Download Now!

Version 5.10.0 (full version)
Available Versions
Install documentation

Generic installer
Windows Installation

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


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

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!

A number of companies can help you with OpenACS:

Resources for Developers

Resources for developers:


AOE media GmbH

Open Source CMS provider in Germany.