1. TWiki is leading open source enterprise wiki and Web 2.

  2. An open source, modern and powerful wiki app built on Node.js, Git, and Markdown.

  3. WordPress social networking in a box.

  4. Social Network For Joomla to grow your communities with the least time.

  5. Oxwall® is an open source mobile-friendly community website platform that is suitable for brand communities, interest-based social networks, and other online community projects. try demo Get Started. slide02 .

  6. BrainLeaf helps web and app developers quickly scope and price their projects.

  7. Pagico is a productivity suite that helps you manage projects, contacts, daily tasks and files.

  8. VoIP and video calling, messaging and presence - all from your computer desktop with the award-winning Bria 5 softphone client.

  9. Free version Records up to 15 minutes, premium is $15/year.

  10. Blue Mind is a complete solution of company messaging, calendars and collaborative work.

  11. SOGo is groupware server with a focus on scalability and open standards.

  12. Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft.