Google open sourced the operating system of the #Pebble smartwatch, 10 years after Pebble went bankrupt, it got sold to Fitbit, which then got acquired by Google.
The founder of Pebble is now bringing out new watches. So there will be a capable smartwatch with a world-class open source operating system.
It is extremely low end, which means 30 days of battery life instead of the measly 1-2 days of some other smartwatches.
What sets Pebble apart as well is its excellent UI/UX and also DX.