One cool feature I've read about is that (at least some) GoPro cameras can save high-resolution IMU measurements to the recorded video files, timestamped and interleaved with video frames. This can be useful for mapping applications, e.g. https://joshi-bharat.github.io/projects/gopro/

Are there any competitors on the market that also have this feature? I've looked around a few times in the past and haven't found any. Many cameras say that they have an IMU, presumably for image stabilization, but they don't seem to record or expose that data.