PC

EndeavourOS - Github - Arch + calamares + a few handy tools, what manjaro says it wants to be, but good.

Librewolf - Firefox, without mozilla.
Kate - Fast. For all the small text editing.
Vscodium - Github - Vscode, without microsoft. For files that Kate can't handle.
hex editor plugin
tldr - Short manpages.
Grub Customizer

Mobile

crDroid - Based on LineageOS with added customization options and wider device support.

F-Droid - The app store for FOSS apps.
Aurora Store - The Google play frontend that respects you.
Fossify Gallery
Fossify Calendar

Online

Redlib - A reddit frontend that doesn't suck.
Nitter - For the 2 things I check out on twitter a month.

Cool stuff I don't use

certbot - Free https.
Zed - Code editor like vscode.
penpot - Similar to figma.
niri - A scrollable DE.
languagetool - A spellchecker.
UnigetUI - A package manager for package managers.
vscode-pets
CatWalk