Google has open-sourced the Pebble OS, a smartwatch operating system that was once a popular alternative to other smartwatches. The open-sourcing of the OS has sparked discussion among users and developers, with some expressing gratitude towards Google for giving back to the community. The Pebble OS was known for its simplicity, long battery life, and ease of use, and its open-sourcing may lead to new developments and fixes for old devices. The OS was previously owned by Fitbit, which was acquired by Google in 2021.