Cuberto . is a UI/UX and development studio based in San Francisco, CA. I might be a little late in the game but they have shared an inspiring and interesting collection of 'open source' of animated micro-interactions for your mobile app design. Trust me, these are great! It's a combination of transitions combining small animations but also more 'complexed' results where you will have many actions like 'dragging a value' with a flair, 'revising the UI shadow' merged with an intuitive interaction on 'tap'. I took the liberty to share them on ABDZ alongside with their direct link to the GitHub source file for your reference. Give it a look!