Show anyone the little black box that is the Dimika Action Cam and that person's first words are likely to be, "That's a camera?"
The entire thing is smaller than a pack of Tic Tacs and measures just 2.5 inches deep by 1.5 inches wide by 0.6-inch high (64x38x16mm) and weighs 1.3 ounces (38g). At that size and weight, you can attach it to a lot of things, including quadcopters, or to a windshield without blocking your view. And if you put it on a helmet, you'd barely notice a difference.
On the left side are a Micro-USB port for charging, a microSDHC card slot supporting cards of up to 32GB, and a pinhole for resetting the camera should it lock up on you (which only happened to me once while testing, and really, that's not unusual for these little cameras).
The only controls are power and record buttons on top, so as you might imagine the Dimika is easy enough to use. Turn it on and a minuscule LED on top lights up: green for video mode 1, blue for video mode 2, and red for photo and time-lapse photo modes. Giving the power button a quick press once the camera is on changes the modes. The LED, by the way, is very difficult to see in bright sun.
Buying the Dimika by itself will set you back $69 if purchased direct from the maker, Innotrends. (For $5 more you can get one with an 8GB microSD card.) The camera has a tripod mount in the bottom, so you can easily find mounts for it. However, Innotrends sells a mini tripod and belt, tube, adhesive, and suction cup mounts for around $5 apiece, and there's a GoPro mount adapter as well, for $3.
A waterproof pouch is also available for $10, though it's a bit awkward to use. The camera itself probably couldn't take too much abuse, so it would be nice to have a small polycarbonate housing as an option, but that doesn't exist right now.