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.
Shortcuts.design is a small website that lists every shortcut a designer ever wants to know, all designapps in one place and in a simple and clear way. It's very usefull for beginning designers to quickly charge their workflow, when you switched to a new designtool or when you just want a reference for repeating actions!
Keyboard Maestro will make you more productive. Even the simplest things, like typing your email address, or going to Gmail or Facebook, launching Pages, or duplicating a line, all take time and add frustration. Let Keyboard Maestro help make your Mac life more pleasant and efficient.
Snippetty is a live coding assistant that lives in your system menu and hands you the right code snippet at the right time. It's an invaluable tool for anyone presenting during webinars, conference talks, corporate demos, podcasts, and more. And instead of making you use some clunky UI, it works with Markdown. Everybody loves Markdown!