1. VideoMeeting is a free and open source video conference solution built to have video calls and chats using your web browser. It is deployed on top of hubl.in.

  2. An IRC-like chatroom hosted on ZeroNet, a distributed network.

  3. Desktop client for Google Hangouts

  4. Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.

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

  6. A desktop chat client for Discord and Slack

  7. A newly open sourced self hosted Slack like alternative for building persistent chat communities

  8. handy and feature-rich enterprise multi-device messenger available for server or cloud – Slack-like, but not Slack-limited

  9. Apply a dark theme to Slack for Mac ⚫️ ✨

  10. TribeScale - The all-in-one platform to manage your teams - Tribescale

  11. hack.chat is a minimal, distraction-free chat application.

  12. Step up your game with a modern voice & text chat app. Crystal clear voice, multiple server and channel support, mobile apps, and more.