7 of 7Image
NightCamera is free and + is $2.99. It nails taking Android smartphone photos in low light, and has plenty of options to get the just-right nighttime shot. The shutter is screen tap only and sometimes crashes between functions.
Instagram, just acquired by Facebook, makes crappy photos look artsy and cool. Plus, the shutter is quick. The camera is limited and is only available in a gated community.