I print on glass all the time without a heated bed. For PLA, use a slurry of glue+water. Or use a glue stick. Works great.
Though I prefer a heated bed with glass.
There are some who claim they can print ABS on a non-heated bed. Adafruit offers a bed material that might work with cold ABS: https://www.adafruit.com/products/2233
And there's a chemical called "Wolfbite" developed by Airwolf that will enhance adhesion: http://airwolf3d.com/shop/wolfbite-prevents-3d-printed-parts-from-warping