Pleroma : Pleroma is a federated social networking platform, compatible with GNU social and other OStatus implementations. It is free software licensed under th...
Postal : Postal is a complete and fully featured mail server for use by websites & web servers. Think Sendgrid, Mailgun or Postmark but open source and ready f...
YunoHost : YunoHost is a server operating system aiming to make self-hosting accessible to everyone.
Radicale : The Radicale Project is a complete CalDAV (calendar) and CardDAV (contact) server solution.
npoint.io : JSON storage bins with schema validation
Social server with an ActivityStreams API. It's a stream server that does most of what people really want from a social network.