Sketch Talk - A community for Sketch users of all skill levels
Glyphy - Copy & paste fancy fonts + cool symbols ☞✺✐™
SketchCasts - A weekly screencast, all about how to use Sketch
SmartPaste - Copy-paste nicely styled text to apps like GMail and Google Docs without learning new shortcuts.
GoRails - Ruby on Rails screencasts for Web Developers
CSS Wand - Easy copy-paste beautiful CSS animations