Meta Tags - Meta Tags is a tool to debug and generate meta tag code for any website.
Shortcuts.design - Every shortcut for designers in one place!
Devhints - TL;DR for developer documentation
KeyCue - Menu shortcuts are supposed to provide quick access to frequently used menu commands.
OpenGraph.xyz - Check how search engines and social medias such as Google, Facebook, Twitter display your website
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.