Sketch Talk - A community for Sketch users of all skill levels
Get Mods APK - Get Mods APK offers a big collection of new and top-rated Android Mod Games, Mod Games, Premium Tools that you can download without signing up.
SketchCasts - A weekly screencast, all about how to use Sketch
5play.ru - 5play.ru enables you to download highly-rated Apps and Games for Android devices.
Sketch 101 by Designlab - Learn Sketch in this free course w/ downloadable templates
iOSGODS! - iOSGODS!