I have used all that are listed but I voted for Degei
I use a spiral notebook and write down each feeding but then go and plug it all into Degei.
I like all the features and amazing amount of information you can post about each animal, track breedings, clutches, ect.

Don't worry about a computer crash... I actually use a free backup program called GFI Backup Home Edition 2009 and backup to an external drive. It is a great free program that you can schedule backups to run automatically when ever you want and has many features that the premium backup software programs offer. I highly recommend it

http://www.gfi.com/backup-hm