TinkerTool - Tinker with the hidden settings of your Mac
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.
Onyx by Titanium - This website provides operating system utilities for macOS
Keysmith - Create custom keyboard shortcuts for your Mac and the web
Cocktail - General purpose system modify/repair utility
Power Menu for Finder - The workflow enhancing Finder extension for Mac