@ -178,6 +178,7 @@ Some [Groupware](#groupware) solutions also feature calendar/address book editin
* [Jitsi Video Bridge](https://jitsi.org/Projects/JitsiVideobridge) - WebRTC compatible Selective Forwarding Unit (SFU) that allows for multiuser video communication. ([Source Code](https://github.com/jitsi/jitsi-videobridge)) `Apache``Java`
* [Kandan](http://getkandan.com/) - Kandan is an Open Source Alternative to HipChat. ([Source Code](https://github.com/kandanapp/kandan)) `AGPLv3``Ruby`
* [Lets-Chat](http://sdelements.github.io/lets-chat/) - A self hosted chat suite written in Node. ([Source Code](https://github.com/sdelements/lets-chat)) `MIT``JavaScript, NodeJS`
* [Live Helper Chat](http://livehelperchat.com/) - Live Support chat for your website. ([Source Code](https://github.com/LiveHelperChat/livehelperchat)) `PHP`
* [Mattermost](http://www.mattermost.org/) - Open-source, on-prem Slack-alternative. It can be integrated with [Gitlab](https://about.gitlab.com/). ([Source Code](https://github.com/mattermost/platform)) `AGPLv3/Apache 2.0``Go`
* [Mibew](https://mibew.org) - Mibew Messenger is an open-source live support application written in PHP and MySQL. It enables one-on-one chat assistance in real-time directly from your website. ([Demo](https://mibew.org/demo2), [Source Code](https://github.com/Mibew/mibew)) `Apache``PHP/Javascript`