Access the OW2 code base directly:

OW2 Projects organized by maturity?
OW2 Projects organized by functionality?


The Consortium's activities for software development are organized into Projects. A Project regroups development actions corresponding to one or more technical software components, or the integration of different technical components in order to build a platform. Projects are the raison d'être of OW2, without projects, OW2 just does not exist. Projects represent the fundamental activity. At OW2, everything starts with a Project.

Building on the legacy of ObjectWeb and OrientWare, OW2 is fully committed to managing open source projects. They currently cover a broad scope of functionality including application platforms, persistency/database solutions, workflow engines, software engineering, etc. OW2 provides a ?home? as well as a showcase to open source software projects. Each project evolves through a well documented project life cycle. OW2 already hosts more than 100 projects.

The Technology Council is responsible for building the overall technical architecture, including defining technical guidelines, for providing technology validation, for making Project lifecycle decisions, for monitoring production and overall Projects consistency.

Submitting a new project

You can directly submit a project from the OW2 Forge project submission page. The fully executed Individual membership of the project leader is the minimum membership requirement for a project to be accepted in incubation. The proposal is then debated on the Technology Council mailing list which evaluates its relevance for OW2 in terms of complementarities, synergies, licence, support, etc. The Technology Council must reach a consensus to adopt the project. Each project must also be presented and discussed at a Technology Council meeting. It is then provisioned in the OW2 Forge and you can start working on it.

Project selection criteria

Project submissions are evaluated by the Technology Council which decides by consensus whether or not to host the project on the OW2 infrastructure. The Technology Council will decide after evaluating and reaching consensus on the four principal following criteria:

  • Is it middleware (at large)?
  • Does the team show goodwill to synergize with other OW2 projects?
  • Is the license compatible with the IPR policy?
  • Is the Project able to release code and/or foster a community?

Competition between projects

OW2 recognizes that a dynamic code base must accept some level of competition between its projects. Moreover OW2 project portfolio is already quite extensive and could not grow without some projects friction or overlap. Projects with overlapping or 'competitive' features will be allowed on the OW2 Forge and in OW2 initiatives so long as:

1) They are provided by an OW2 Member.
2) They are distributed under an OSI-approved license.
3) They are differentiated from existing projects.
4) They are accepted by the Technology Council.

Projects Life Cycle

The project life cycle is composed of three stages: Incubation, Mature and Archive.

New projects start in the Incubation stage then may move to the Mature stage and, ultimately, might end up in Archive stage depending on periodic evaluation by the Technology Council (see the project lifecycle criteria page).

The Technology Council should organize regular reviews of projects to manage their lifecycle status.

Upon request, a projet may want to trigger its status change. To do so, contact the Technology Council at tc AT ow2 DOT org.

A fully executed Corporate or Strategic membership is required for a project to be moved from Incubation to Mature status. Community projects based on individual members only will be handled on a case-by-case basis. Competition will be re-assessed for moving to the Mature status.

Interoperability Clusters: the Himalaya program

Starting in 2008, the OW2 community launched a long-term effort to develop seamless interoperability between the different software components which comprise its code base. This is a long-term bottom-up, peer-to-peer (and on-and-off!) endeavour aiming at enhancing technical relationship between projects. Some projects with natural complementarities will group to create what we call interoperability clusters. These clusters will then connect to form a comprehensive range hence the name of the program.

In 2011, this effort will be resumed based on selected pivotal projects. Stay tuned.


Many OW2 projects already come as ready-to-use packages. They are provided as complete archives which you only needs to download and install to start using them.

You can access the OW2 code base organized in several functional categories here?.

Other OW2 projects are not listed here because no stable version is packaged so far. To download them, you need to use the Forge. As developments go on, more projects are made available for download, so this list is going to expand. Stay tuned and come back to check for new packages.