OpenCms is true Open Source Software and thus there are no licensing costs for using the software. This, of course, includes commercial usage on as many servers or clients or databases as you like.
OpenCms is very stable and mature. The system has been in active Open Source development since 1999, and it has been deployed by a large number of international companies and organizations for websites as well as for Intranet or Extranet applications. Please check out the list of Reference Sites to get an impression of some of the sites successfully using OpenCms.
If you decide to use OpenCms, you will benefit from the success of OpenCms as it gains more and more widespread use. Have a look at the Promoting and Sponsoring page to check how you can help making OpenCms even more popular.
We welcome all development contributions to the OpenCms project, please check out our Development section for more details on how to participate in the OpenCms development. You can for example help by developing additions or enhancements to the OpenCms core system, by publishing OpenCms modules, by working on the documentation for OpenCms, or by translating OpenCms to other languages.
OpenCms (the product) should be spelled with capital "O" and "C", the rest is all lower case, and it's one word. So it's "OpenCms". The following spellings are all "wrong": OpenCMS, Open CMS, openCMS, Opencms... In case you write about (or refer to) OpenCms, please use the "right" spelling.
OpenCms uses the lesser GNU general public license, or LGPL, version 2.1. The LGPL is one of the most accepted Open Source licenses. It is verified as a "true" Open Source license by the Open Source Initiative (OSI). The full text of the LGPL is available on the website of the Free Software Foundation (FSF). For further information about the LGPL, please see the website of the FSF.
OpenCms has a build in module API (which is in fact a Java interface). All modules that use that API are in terms of the LGPL "works that use the library" and therefore are not bound by the LGPL license. However, if additions or changes to the core system are made, the result is a derivative work, and certain restrictions apply, the most important being that the license used for the derivative work must also be the LGPL.
So companies can develop their additions to OpenCms as a module and choose any license they like. However, the OpenCms core system and all enhancements or additions to it will stay Open Source.
The development of OpenCms is officially coordinated by Alkacon Software. An active Open Source community is participating in the OpenCms development and a number of Alkacon OpenCms Partners offer professional support for OpenCms.
OpenCms is based on ideas and software developed and deployed since 1994. The first versions of OpenCms were developed by Alexander Kandzior as an "in house" web agency solution while working on various professional web projects between 1994 and 1999.
The first open source release of OpenCms was issued March 2000. Since then, OpenCms has been continuosly developed as an Open Source project. A number of companies and individuals have contributed to the development.
Starting 2002, Alkacon Software GmbH, a software development company started by Alexander Kandzior, has been doing most of the work on the core OpenCms core system. Alkacon Software has been officially coordinating the further development of OpenCms and the opencms.org website since then.
OpenCms 5.0 was released by Alkacon in May 2003. OpenCms 6.0 was released by Alkacon in May 2005, followed by OpenCms 6.2 in March 2006. OpenCms version 7.0 was released by Alkacon in July 2007.
Dec 9, 2016 - OCEE 5.5.0 supports OpenCms 10.5.0 and brings seveal improvements to the LDAP Connector. It also adds more shell commands for remote cluster administration, and fixes some issues. Updated OCEE packages for 10.0, 9.x and 8.x based OpenCms installations are also available.
Nov 30, 2016 - OpenCms 10.5 focuses on site localization, adding tools for assisted translation of pages and sitemaps. Many usability improvements have been made for the Page Editor and the Explorer. OpenCms 10.5 also ships a much improved version of the Apollo Template. Based on Bootstrap, the Apollo Template is fully customizable without coding.
Nov 30, 2016 - The OpenCms 10.5 release notes contain detailed information about the new features and fixes in this version.
Nov 30, 2016 - Test OpenCms 10.5 using the official image from the Docker hub registry - the fastest way to evaluate and test OpenCms.
OpenCms Days 2016 will take place September 26 to 27 in Cologne, Germany.
Highlight of the international user conference and expo will be the introduction of OpenCms 10.5. OpenCms Days will be the perfect opportunity to exchange experiences around OpenCms with high profile participants and speakers from all over the world.
Visit this 2 day conference and expo to meet and mingle with leading OpenCms experts and other OpenCms users.
OpenCms Days 2016 is targeted towards an international audience. The language spoken at the event and used for all presentations is English.
Our guided tour shows you the great features OpenCms offers.