Collaborating tools

Collaborating document creation⚑

• https://pad.riseup.net
• https://rustpad.io . Can be self hosted

Collaborating event date picker⚑

• https://crab.fit/

Collaborating book libraries⚑

• https://inventaire.io/welcome

Collaborating through terminals⚑

• sshx looks promising although I think it uses their servers to do the connection, which is troublesome.