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.
iCanHazShortcut - Simple shortcut manager for OS X 10.8 or higher.
Thundertick - Search engine for your browser
CustomShortcuts - Customize your Mac menu keyboard shortcuts for free.
Command-Tab Plus - Command-Tab Plus - Powerful and Customizable Applications and Windows Switcher for Mac OS X.
Keysmith - Create custom keyboard shortcuts for your Mac and the web