Website: Comic Life 2
Free trial: 30 days, full functionality
Price: $29.99 Mac or Windows.
The purpose of this program is to allow you to add text, word art, or dialogue to your pictures. It can be used for a number of purposes including putting together comics, instructional manuals, l0l-catz type pictures, or organized photo albums.
The program is exceptionally quick and easy to learn, you should be able to be productive with it the first day.
For the price and purpose, there really isn’t anything else out there quite like it.