TLDR pages - The TLDR pages are a community effort to simplify the beloved man pages with practical examples.
Shortcuts.design - Every shortcut for designers in one place!
CheatKeys - View Windows keyboard shortcuts in the current application.
KeyCue - Menu shortcuts are supposed to provide quick access to frequently used menu commands.
explainshell - Match command-line arguments to their help.
Alfred - Alfred is an award-winning app for macOS which boosts your efficiency with hotkeys, keywords, text expansion and more. Search your Mac and the web, and be more productive with custom actions to control your Mac.