Kinto : Kinto is a lightweight JSON storage service with synchronisation and sharing abilities.
CryptPad : CryptPad is the Zero Knowledge realtime collaborative editor.
Encryption carried out in your web browser protects the data from the server, the cloud ...
Zulip : Powerful slack-like open source group chat
Mattermost : Mattermost is a self-hosted solution for bringing all your team communication to one place, and making it searchable and accessible anywhere
cal.com : Open source meeting scheduling tool. Send a link, let others book a slot. Calendly alternative.
An open-source distributed storage service you can self-host to fullfill many needs.
