Many serious UI designers use the Mac Sketch app to design their screens but have to resort to 3rd party tools in order to show animated previews. The Diya plugin renders animations inside Sketch & can save you a lot of time & effort. The aim of the plugin is to bring timeline animation directly to Sketch. With it you can animate designs & preview them right away, without ever having to leave Sketch.
Micro Animations is ideal for users who are involved in prototyping apps. It allows them to download & drop micro animations into their prototypes easily.