Velvet UI Kit - Cozy iOS UI Kit designed for Sketch 🌸
Lottie by Airbnb - Easily add high-quality animation to any native app
Owlead - Grow your Twitter with valuable followers, effortless
Marionette Studio - Marionette Studio is an online animation software for beginners and professionals. Animate 2D characters and environments in minutes with no prior skills.
Angle 2 Mockups - A giant Sketch Library for creating app presentations
Spirit - The animation tool for the web.