CheatKeys - View Windows keyboard shortcuts in the current application.
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.
Hotkey Commander - Find out and override what hotkey combination is registered by which application.
Keysmith - Create custom keyboard shortcuts for your Mac and the web
KeyCue - Menu shortcuts are supposed to provide quick access to frequently used menu commands.
Power Menu for Finder - The workflow enhancing Finder extension for Mac