https://github.com/FossifyOrg/Calendar - on f-droid, simple and gets the job done https://github.com/OmGodse/Notally - on f-droid, simple with no bloat

https://forum.openwrt.org/t/best-newcomer-routers-2024/189050/2 this comes right from their forum and is a good list

ANOM?

I’m confused, is this different than?

https://send.vis.ee/

This site states “⚠️ Send will be terminated on May 24th. ⚠️ Costs are getting too high to keep hosting this service. Find an alternative instance here or host your own.”