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for everyone

Created by OpenACS community, last modified by Gustaf Neumann 16 Jun 2017, at 09:01 AM

OpenACS for everyone

OpenACS (Open Architecture Community System) is:

  • an advanced toolkit for building scalable, community-oriented web applications.
  • a robust, scalable framework (see: en:openacs-system) for building dynamic content driven sites and enterprise-level web applications.
  • a collection of pre-built applications and services that you can build on to create a custom web-site or application.
  • derived from the ArsDigita Community System (ACS). ArsDigita (now part of Red Hat, Inc.) kindly made their work available under the GPL, making all of this possible.

Through a modular architecture, OpenACS has packages for user/groups management, content management, e-commerce, news, FAQs, calendar, forums, bug tracking, wiki (XoWiki ), full-text searching etc. See OpenACS repository.


Use the OpenACS fourms to contact the OpenACS community. We welcome your feedback and can help with your OpenACS endeavors. Commercial support is also available.

What others say about OpenACS


Testimonials posted to forums on OpenACS

Try OpenACS

History of OpenACS

See: History of OpenACS en:docs-history

Bibliography and Credits

See: Documentation Credits en:doc-credits

(Sketch for) OpenACS Home

Created by Dave Bauer, last modified by Gustaf Neumann 07 Jun 2017, at 09:28 AM

OpenACS (Open Architecture Community System) is a toolkit for building scalable, community-oriented web applications. OpenACS is the foundation for many products and websites, including the .LRN e-learning platform. OpenACS is open source and is available under the GNU General Public License.

Why use OpenACS?

OpenACS is unique in the breadth of services it offers developers and administrators. Millions of dollars and decades of developer time have gone into the maturation of OpenACS.

You can read the technical reasons to use OpenACS.

How do I install OpenACS?

The installation documentation contains all the necessary steps to install OpenACS on a large variety of systems. There is also a Windows Installer and other packaged installations openacs-system-install. Also Check the installation requirements before installing. The current stable release is OpenACS 5.9.0 (cvs aliases).

How do I work with OpenACS?

You can start by reading the documentation , specifically tips on customizing , the developer's tutorial , and
the FAQs . There is a OpenACS Wiki and a list of packages that extend OpenACS.

For professional help, contact one of the OpenACS companies .

OpenACS Community

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


NewsSubscribe via RSS

Upgrade to PostgreSQL 9.6 and Downtime

OpenACS is now upgraded to PostgreSQL 9.6. Due to a hardware problem with a RAID controller there will be a scheduled downtime on Monday, June 19th from 6:50 to about 8:00 CEST (middle European Time)
Published on Jun 16, 2017

OpenACS 5.9.0 final released

We are proud to announce the release of OpenACS 5.9.0.
This release contains many security and performance improvements as well as new functionality. The new release differs from OpenACS 5.8.1 in the following points:
  • PostgreSQL enhancements and cleanups to improve performance and maintainability of the basic data model
  • Greatly improved HTML validity and protection against XSS attacks.
  • Improved theming support to create responsive interfaces.
  • Various new functionalities to ease debugging and to improve performance.

Altogether, OpenACS 5.9.0 differs from OpenACS 5.8.1 in more than 100,000 modifications contributed by 4 committers. All packages of the release were tested with PostgreSQL 9.4.* and Tcl 8.5.*.

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

Release Announcement, ChangeLog, Download

Published on Dec 01, 2015

Recent Posts

OpenACS Development

OpenACS Community Wiki

Created by gustaf neumann, last modified by Gustaf Neumann 22 Apr 2017, at 02:50 PM

Welcome to the OpenACS Wiki!

This is the OpenACS Wiki system, built with the xowiki package. This wiki contains user documentation, how-tos, and tips and tricks related to OpenACS. It also serves as a collaboration area for OpenACS contributors.

Quick Links:

OpenACS Handbook: openacs-handbook
OpenACS Packages: packages
OpenACS Installation: openacs-system-install


Recent Wiki Page Edits:

OpenACS Projects


External Resources

Subsystems Documentation


Testing Pages

toc-test-page (4 days ago)
TOC includelet test (4 days ago)

Core Documentation

Coding Standards


Zen Project


Tutorials for Administrators

Non-Core Packages

xolirc (1 week ago)
XoWiki (1 week ago)
Dynamic Object Type (1 week ago)
Calendar (2 weeks ago)



dotLRN - Ecommerce (1 week ago)

Our Website



News (1 week ago)



for everyone (1 week ago)

for developers

Created by OpenACS community, last modified by Gustaf Neumann 20 Apr 2017, at 06:44 PM

OpenACS for developers


Besides the quality components of Openacs (See: en:openacs-system), OpenACS has these enterprise-quality features for developers:

will be pulling in docs from here: and

Integrated Development Environments (IDE)

These text editors are commonly used when coding on OpenACS:

Bibliography and Credits

See en:doc-credits.

for beginning developers

Created by OpenACS community, last modified by Michael Feurstein 28 Oct 2016, at 09:22 AM

Tutorials for OpenACS development

Other related tutorials

See also: OpenACS Mentorship Program

Other useful resources

Web Sites


for administrators

Created by OpenACS community, last modified by Torben Brosten 22 Aug 2008, at 08:29 AM

OpenACS for administrators

will be pulling in docs from here:

Getting help: en:docs-admin-help

Install OpenACS: en:docs-install

set up database environment variables.. see end of and

creating custom pages: see developer tutorials ( )

Administrating a system 


Also, these OpenACS packages are your friends:

Performance monitoring


Bibliography and Credits

See en:doc-credits.

OpenACS Handbook

Created by OpenACS community, last modified by Torben Brosten 22 Jan 2007, at 06:19 AM

OpenACS Handbook

Documentation Credits doc-credits

Documentation Project Documentation_Project

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