Some stuff I've made in Hammerspoon you can use:

- Vim mode everywhere in macOS: https://github.com/dbalatero/VimMode.spoon

- Modifier keys + click/drag to resize or move windows: https://github.com/dbalatero/SkyRocket.spoon

- Show an overlay helper of all your keybinds when you hold modifier keys down: https://github.com/dbalatero/HyperKey.spoon

And my huge pile of random scripts/configs: https://github.com/dbalatero/nixpkgs/tree/main/home/modules/...