cheat - Cheat allows you to create and view interactive cheatsheets on the command-line.
explainshell - Match command-line arguments to their help.
cheat.sh - The only cheat sheet you need Unified access to the best community driven documentation
CheatSheet - View Mac keyboard shortcuts in the current application
MobaXterm - MobaXterm is a software that uses a set of optimized network tools included in a single exe file. MobaXterm integrates several network clients with an X server, and also integrates a full set of Unix based commands. Read more about MobaXterm.
CheatKeys - View Windows keyboard shortcuts in the current application.