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Project of the month: ProActive

ProActive Workflows & Scheduling is an open source middleware featuring Programming, Scheduling and Resourcing tools for parallel, distributed and multi-core computing.

News and Events



We are pleased to confirm that the OW2 Community Day 2020 will take place on November 3 in Grenoble, as part of the OW2con'20 face-to-face event. The program includes two sessions (open source governance, software dependencies), and many networking sessions, including the OW2 2020 Best Projects Awards Ceremony. Stay tuned!



OW2online'20 is a wrap! With over 300 participants, 35 presentations and speakers representing 13 nationalities, OW2con is, this year again, a true expression of the European open source ecosystem. Check out videos and slides of OW2online'20. 


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

A unique European open source ecosystem
OW2 is central to a unique European ecosystem of open source people and organizations cooperating... more

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