I just got my Hero 5 Session and wanted a good way to use it more like a "normal camera" when it isn't attached to my quad copter.
Just a basic gopro connector from http://www.thingiverse.com/thing:62800 with a 90 degree handle. I added a foot so it can easily be placed for time lapse or other longer steady shots. Also tossed in a couple of grooves to allow more easy use of a bungee/hairtie/rubber band to hold it. Holes in the grip are for the same purpose.