Open Source Community for Infrastructure Software

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. ProActive is provided by ActiveEon OW2 corporate member and won an award for the “2018 Best Innovation” at the "Champion of Free Software" contest organized at Paris Open Source Summit in November 2018.

News and Events



OW2 is a non-profit, open community driven by its members and for this reason, your opinion matters, your voice is heard, your involvement and your votes are important! Not just a privilege, voting to have a say in the governance of OW2 is a right and a duty.


On September 5, we encourage all members and contributors to tell their policy makers how Article 13 will affect the preservation, sharing and improving of code. Follow easy instructions here or go directly to the #SaveYourInternet #DeleteArt13  website.



OW2con'19 Call For Presentation is open! Please check out the details of this year's main theme and topics and submit now!. (Extended Deadline: March 31). Sponsoring opportunities are opened, check out our sponsor packages


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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!



Great result for OW2 projects and members at the "Champion of Free Software" contest organized in the framework of Paris Open Source Summit. 


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

An important pillar for the open source community
We were proud to have OW2 as one of the first partners in the OpenStack ecosystem. Cedric and his... 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