CheatKeys - View Windows keyboard shortcuts in the current application.
Keypirinha - A lightning fast and flexible keystroke launcher for Windows. No installation required (portable).
Hotkey Commander - Find out and override what hotkey combination is registered by which application.
Listary - Listary is a revolutionary search utility for Windows
KeyCue - Menu shortcuts are supposed to provide quick access to frequently used menu commands.
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.