1. ArrowChat is a jQuery based live chat software that uses PHP and mySQL.

  2. Async is a one-of-a-kind communication and project management tool for small teams of software engineers.

  3. Video conversations with up to 8 people in your browser - no downloads, no login.

  4. Join a WebRTC video conference powered by the Jitsi Videobridge

  5. Meet CARROT, the to-do list with a personality.

  6. Secure instant messenger for any network

    freemium

  7. Openfire (formerly Wildfire) is a cross-platform instant messaging (IM) and groupchat server.

  8. XMPP client designed with ease of use and security in mind

  9. Crust Messaging is a secure, high performance, open source Slack alternative that allows your teams...

  10. Project management software for SMBs. Online collaboration tool to increase productivity used by 25,000+ businesses.

  11. A new way to talk to each other

  12. Group messaging, tasks, and scheduling all in one app