Open Architecture Community System (OpenACS) is an advanced Open Source toolkit for developing community web applications licensed under the terms of the GNU GPL.

The Open Architecture Community System provides:

• A large set of applications, that can be used to deploy web sites that are strong on collaboration. Some of the powerful applications are Workflow, CMS, Messaging, Bug/Issue tracker, e-commerce, blogger, chat and forums. OpenACS has dozens more applications.
• A sophisticated application development toolkit, that provides a extensive set of APIs and services to enable quick development of new applications.

OpenACS runs on AOLserver with either Oracle or PostgreSQL as its database.

Sidenote: OpenACS was originally developed side-by-side with the ArsDigita Community System (ACS), a product of ArsDigita Corporation. ACS remains one of the more famous products to be based completely on the AOLserver. In 2002, after the ACS code tree forked, the Tcl code base came to be maintained by the OpenACS project.

See also:

• http://openacs.org/about/
• Philip Greenspun (http://photo.net/philg)
• Web_content_management

External links

• OpenACS Homepage (http://openacs.org/)
• OpenACS 3.x Documentation (http://openacs.org/doc/)
• AOLserver (http://www.aolserver.com/)