pump.io : Social server with an ActivityStreams API. It's a stream server that does most of what people really want from a social network.
Terraform by HashiCorp : HashiCorp Terraform enables you to safely and predictably create, change, and improve infrastructure. It is an open source tool that codifies APIs int...
Mail-in-a-Box : Each Mail-in-a-Box provides webmail and an IMAP/SMTP server for use with mobile devices and desktop mail software. It also includes contacts and calen...
Zulip : Zulip is a powerful, open source group chat application that combines the immediacy of real-time chat with the productivity benefits of threaded conve...
Radicale : The Radicale Project is a complete CalDAV (calendar) and CardDAV (contact) server solution.
websocketd is the WebSocket daemon
It takes care of handling the WebSocket connections,
launching your programs to handle the WebSockets,
and passing messages between programs and web-browser.