CheatSheet is lets you view available keyboard shortcuts in your current application. Just hold the ⌘-Key a bit longer to get a list of all active short cuts of the current application. It's as simple as that.
Alfred is an award-winning app for Mac OS X 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.
Haystack helps you make the most of your time, by searching all your files and documents in the cloud in one place. It's been built for privacy from the ground up, so your data isn't stored on a server, just your computer.
ActiveDock is Improved Dock for macOS
Common Shortcuts is a simple tool for those who use the same software everyday but never remember the shortcut for common tasks.
Diamond is a tool for Mac and Windows that helps you search through all your files and mails, offline and on the cloud with ease.
Simple Mac menu bar app that lets you easily access your most important and frequently used files, folder or apps FAST with just a shortcut