KeyCue - Menu shortcuts are supposed to provide quick access to frequently used menu commands.
fish shell - The friendly interactive shell.
CheatKeys - View Windows keyboard shortcuts in the current application.
zsh - The Z shell (Zsh) is a Unix shell that can be used as an interactive login shell and as a powerful command interpreter for shell scripting.
cheat - Cheat allows you to create and view interactive cheatsheets on the command-line.
PowerShell Plus - Learn how to learn and master PowerShell fast with an interactive learning center, a powerful IDE, pre-loaded scripts, and a PowerShell Editor… all for free.