Meta Tags - Meta Tags is a tool to debug and generate meta tag code for any website.
Tips.how - A place to share small tips on any topic
Devhints - TL;DR for developer documentation
Muzli - UI/UX and Design Inspiration Chrome Extension
OpenGraph.xyz - Check how search engines and social medias such as Google, Facebook, Twitter display your website
Material Up - Curates the best of Material Design inspiration, tools and freebies.