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!
Keyboard shortcuts for the app you're currently using
Pretzel is Mac desktop app that shows and find keyboard shortcuts based on your current app.