And Rocketchat and Gitter (now also matrix)…
Kobo Glow here. It works fine, no larger complaints although small things could certainly be improved. The most amazing thing is that I’m using it for about 10 years now. Battery is a bit weaker but still OK. It’d be nice to have more devices with such a lifetime.
Cryptpad is using a custom, zero-knowledge Version of only office. They describe the relationship between both here: https://docs.cryptpad.org/en/FAQ.html#what-is-the-relationship-between-cryptpad-and-onlyoffice
Is Django not FOSS?