Galaxia - Mini social networks for all your personas
Manyverse - A social network off the grid
Mastodon - Mastodon is a decentralized, open source social network. This is just one part of the network, run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome!
Public - Group chats.
Caret - Better Markdown Editor for Mac / Windows / Linux
Wire - Private & Secure Messenger