Access your files from any device, using its built-in mobile-first file manager, complete with picture browser, media player, PDF reader, ODF previewer, and plain text, CSV and MarkDown viewers and editors. Try it now.
Use Ratatoskr with DAVx5 to store your calendars and contacts on your own server and synchronise them between your devices.
Ratatoskr is a single-threaded server in less than 1000 lines of MicroPython, and depends on nothing but MicroPython, libc and libffi.
The server is designed to run on small devices, especially routers running OpenWRT. The Ratatoskr instance serving this website uses only 2.3MB of RAM.