@ -291,6 +291,7 @@ _See also: [Comparison of CalDAV and CardDAV implementations - Wikipedia](https:
- [Lets-Chat](http://sdelements.github.io/lets-chat/) - Self hosted chat suite written in Node. ([Source Code](https://github.com/sdelements/lets-chat)) `MIT``Nodejs`
- [Live Helper Chat](http://livehelperchat.com/) - Live Support chat for your website. ([Source Code](https://github.com/LiveHelperChat/livehelperchat)) `Apache-2.0``PHP`
- [Mattermost](http://www.mattermost.org/) - Open-source, on-prem Slack-alternative. It can be integrated with Gitlab. ([Source Code](https://github.com/mattermost/mattermost-server)) `AGPL-3.0/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-2.0``PHP`