Open Source Community for Infrastructure Software

Project of the month: LemonLDAP::NG


LemonLDAP::NG is a modular WebSSO (Single Sign On) based on Apache::Session modules. It simplifies the build of a protected area with only few changes in the application. LemonLDAP::NG project received the OW2con'18 Best Project Community Award.

News and Events



OW2 is as usual highly involved in POSS, with the organization of a community booth in the exhibition and the coordination of four conference tracks : Open Source Community Summit, OSS in Big Cities, Collaborative Innovation, OSS Governance.  



Congratulations to this year's OW2con Best Project Awards, XWiki for the Community Award, ProActive for the Innovation Award and CLIF for the Market Award. 


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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!


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

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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.

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