In 2017 OW2 celebrates its 10th anniversary! Check out the testimonial page.

A mature and lively community with a clear vision of the future
When I started to work at OW2 from its foundation, I was expecting to find out from the inside how... more

News and Events


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Why is tax-funded software not published as Free Software? OW2 supports the Public Money? Public Code! campaign steered by the Free Software Foundation Europe (FSFE). Sign the Open Letter!



FOSDEM, Brussels, February 3-4, 2018
OW2 exhibits at FOSDEM (K area, level 2). Project leaders: Join us and help promote OW2 code base! 



Cloud Computing World Expo, March 21-22, Paris
OW2 organizes its fifth Open Cloud Forum at CCWE in Paris. The call for speakers is open for OW2 project presentations and public round tables.



Join us June 7-8, at Orange Gardens, Paris-Chatillon.
The Call For Presentation for our 2018 Annual Conference OW2con'18 is still open. The deadline to send your proposal has been extended to March 16th, do not wait, submit now! Check out our sponsorship opportunies.


How can you take part in the Community?

What is OW2

OW2 is an independent community dedicated to open source industry-grade enterprise computing infrastructure software, including middleware, application platforms and cloud computing technologies.

Why Join OW2

Make a stand, focus your open source efforts, help steer the community, increase your open source visibility, promote your projects, and join renowned industry leaders, SMEs, academics and individuals.

Free Infrastructure Software

OW2 hosts some one hundred open source projects spanning application platforms, components, middleware, cloudware and tools for the development, deployment and management of distributed and cloud applications.

Submit a Project

At OW2 it usually starts with an open source project. We provide resources, governance and help build awareness for your project. Checkout the project life cycle and fill in the submission form. Join the code base.

Quality and Trustworthiness

Enhance the quality and facilitate the market adoption of your project with the unique suite of tools freely accessible with Open-source Software Capability Assessment Radar (OSCAR) the OW2 quality program.


Check out the beta version of OW2 marketplace at EU-funded project AppHub. Stay tuned for future development and full opening of the marketplace to OW2 projects in 2017.

Download OW2 Software

Infrastructure Software, Application Platform, Middleware, Tools

Featured Project: ProActive Workflows & Scheduling

ProActive Workflows & Scheduling is an open source middleware featuring Programming, Scheduling and Resourcing tools for parallel, distributed and multi-core computing. Workflows & Scheduling allows  to easily distribute and execute all company jobs and business applications, monitor activity and view jobs results. It ensures more work done with fewer resources, managing heterogeneous platforms, multiple sites. It maximizes utilization of both existing and Cloud IT infrastructures. ProActive is managed by OW2 Corporate Member ActiveEon. Among other references, ProActive is used by major organizations such as Legal & General, l’Oréal, Orange, CEA, Home Office (Ministry of Interior in UK), AxisPoint/McKESSON (Healthcare, USA). ProActive received an OW2 Market Award in 2017 during the OW2 Annual Conference.

Collaborative Projects

Leveraging open source to foster collaborative innovation is a powerful strategy. OW2 is an experienced Open Source Software community for collaborative R&D projects. We provides community support and dissemination services and community building services to multinational open source collaborative projects and large collaborative R&D projects. In particular, OW2 has established itself as the reference dissemination and community platform for complex government-supported, open source-oriented projects

They trust us