Flowkey - The easiest way to learn piano with your iPhone or iPad
GIFjam for Messenger - Animated GIF memes for Facebook Messenger
Yousician - Learn to play music at home, at your own pace
Crumbles - Crumbles are like reaction GIFs with a way bigger vocabulary
Melodics - Melodics is a desktop app that teaches you to play MIDI keyboards, pad controllers, and drums.
GIF Search on Twitter - Get ready to search and send GIFs in tweets and DM's