Journey Maker allows you to create interactive stories, comics, cards, choose-your-own-adventure type games and more with zero programming. Projects can contain animation and MP3 sounds and be deployed as either Mac Applications or "Web Folders" that can be served over the internet to Macs, PCs, iPhones or iPod Touches (if you have a web host provider).
||Free to try
Mac OS X 10.5 PPC
Mac OS X 10.5 Intel
Mac OS X 10.6
||At least Safari 3 or Firefox 2
Intel or G5 (multi-core) processor
512 MB of free RAM minimum (more preferred if dealing with lots of very large images)