I like Vyper. 10 ish years ago I had tried different snake trackers for my collection as well as excel sheets...but just ended keeping everything in a 3 ring binder. I really like the booklet thing Vyper creates. Then I just grab the lap-top and add the info in at convienence. I dont have a huge collection yet, but working good so far.

YouTube - VYPER Reptile Tracking Software from J. Kobylka Reptiles!