wasp-os - Firmware for smart watches based on the nRF52 family of microcontrollers (including Pine64 PineTime)
Waterpebble - Your little water saver
InfiniTime - InfiniTime is an open-source, C++-based firmware OS specifically made for the PineTime smartwatch.
Apple - Available on iOS
watchOS - Apple's new OS for the Apple Watch ⌚
Blocks - Empowering designers to build great websites without writing a line of code. For web and OS X.