LIFX Widget
Control your light bulbs. Right from your phone's notification center.
App Store - Open source - Written in Swift
I write code for a living
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Mobee 
Self-service electric car in Monaco. Find the nearest cars, book them and turn them on with your phone !
App Store - Official website - Made at GoProd
NuageApp
Upload a screenshot from your phone. Get a link to share it from your Mac in seconds.
App Store - Written in ObjC