- Karabiner-Elements[0] for key remapping, specifically, for making caps lock into ctrl/esc. I don't know of anything else that does this job. Everyone who remaps keys seems to use this.
- Kitty[1] as my terminal of choice. I spend most of my time logged in remotely to a server via ssh where I attach to a tmux session. Kitty was easy enough to configure/theme and seems well-documented.
- Hammerspoon[2] for a DIY automation/keybinding/window management sys scriptable via lua. I use a private fork of this config: https://github.com/jasonrudolph/keyboard/tree/main
- Vivid[3] to make my macbook's screen brighter when outdoors on sunny days. This is important for me, since I try to spend as much time outside as possible.
[0] https://karabiner-elements.pqrs.org/
[1] https://sw.kovidgoyal.net/kitty/