Contour Contour+2, ContourRoam
Sony Action Cam (HDR-AS10 and HDR-AS15)
Polaroid XS7, XS20 and XS100
AEE BlackEye XTR (Magicam SD21) (www.aee.com/en/)
UnmannedTech FPV HD camera
Tons of unknown asian brands like 808 #16 720p micro camera ($8 to $40).
The only thing I wish the HD3 Black had was GPS so that you could geotag your videos. That's about the biggest missing piece to that camera, otherwise it would be perfect.
I really like the look and design of contour's latest model (Contour +2), but having seen the user reviews on Amazon.com and amazon.co.uk, I feel that for me the software quality and functionality issues mean that I just won't buy it, unless this is greatly improved.