Osmand - I use this along Google maps, but it's nice to have entire regions downloaded and it shows more information than Google maps, specifically for back country stuff where you need to see every type of trail
Home Assistant
Wireguard - I love that the protocol is lightweight and secure, makes it really easy to access my home network without needing to expose self hosted stuff to the internet
Bitwarden - self hosted with vaultwarden/SQLite, changed my life and it's really easy to share logins with my partner
Immich - self hosted, the first real replacement for Google photos I've found. It has autobackup and it's really easy to share albums.
Kiss Launcher - I like how simple it is. My home screen ends up disorganized anyway so it's honestly just faster to have a recents list and a quick search feature.
I switched to Linux a long time ago, it's only getting better and better. After valve started making serious investments in the ecosystem it has only gotten better for desktop usage and it simply 'works' in ways that even windows struggles with, ie: ps4 controllers/switch controllers work ootb, gamescope allows significantly more control over how games are rendered and offers a true console-like experience combined with big picture UI.