cheat - Cheat allows you to create and view interactive cheatsheets on the command-line.
TrayStatus - Do you have a notebook or keyboard without a NumLock or CapsLock indicator light? Do you have a computer without a hard drive activity light? If so, then TrayStatus is for you.
cheat.sh - The only cheat sheet you need Unified access to the best community driven documentation
Keyboard LEDs - Indicators for Caps Lock, and Num Lock.
explainshell - Match command-line arguments to their help.
CapsLock Indicator - CapsLock Indicator is a small utility that indicates the state of the Num lock, Caps lock and Scroll lock key.