- [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`
- [Niltalk](http://niltalk.com/) - Simple, private, persistence-free web based multi-room chat server + client. ([Source Code](https://github.com/knadh/niltalk)) `AGPL-3.0``Go`
- [Node-Chat](https://github.com/IgorAntun/node-chat) - Not-so-basic open-source chat with admin features. `MIT``Nodejs`
- [Pushjet](https://pushjet.io/) - Self hosted push notification service built with a simple API making sending notifications easy. ([Source Code](https://github.com/Pushjet/Pushjet-Server-Api)) `BSD-2-Clause``Python`
- [Rallly](http://rallly.co) - Rallly is a free collaborative scheduling service. ([Source Code](https://github.com/lukevella/Rallly)) `CC-BY-SA-4.0``Nodejs`