Azendoo is a project management & team collaboration platform.

Bitrix24 is a free (for small businesses) social enterprise platform.

eXo Platform is an open source, standard-based, Enterprise Social Collaboration Platform.

Huddle is a team collaboration & project management software for enterprise and government.

Jostle is a people engagement platform mainly focused on employee engagement.

MOOVIA is an enjoyable and secure social environment to host your team`s projects, tasks, meetings, ideas, messages and documents.

Basecamp is a project management web app.

Diaspora is a nonprofit, user-owned, distributed social network that is based upon the free Diaspora software.

Glip is fully searchable, real-time group chat; video chat, task management, file sharing app.

HumHub is a free social network software and framework built to give you the tools to make teamwork easy and successful.

Libertree is a free, libre, open-source software that lets people create their own social network.

Movim (My Open Virtual Identity Manager) is a distributed social network built on top of XMPP, a popular open standards communication protocol.