Obsidian
For personal knowledge management and more
realtimecolors.com
For choosing and testing color and font combinations
OBS
For screen recording and streaming
SyncThing
For easily syncing folders across devices. Can also be used to sync Obsidian on your smartphone.
Aegis Authenticator (Android only)
Free and open source authenticator app. Ad-free, no cloud, you own your keys (back up however you wish), not tied to a phone number or anything
VLC Media Player:
It just works. It can play virtually any video or audio format you throw at it without needing extra codecs (including videos from your own media server)
Web Video Caster
Any video you can play in your phone’s browser, you can now play on your smart TV.
Sadly, there isn’t a Photoshop alternative for now (on the level of Blender). If I get rich and retire early, I might start that project.