Code Line Daily - Explore a new line of code every day
Pretzel - Keyboard shortcuts for the app you're currently using
Code Doodles - See an amazing code demo on every new tab
KeyCue - Menu shortcuts are supposed to provide quick access to frequently used menu commands.
React Complex Tree - Unopinionated accessible tree component with drag and drop
Hotkey Commander - Find out and override what hotkey combination is registered by which application.