I saw this posted on an Indiana fishing forum and thought I'd share it here. It is free and available in both the App Store and the Android Market. I downloaded it last night, but haven't had a chance to test it in the field. I did tinker around with it a bit at home and I really like the report it gives you, but be warned you do have to enter in a decent amount of information.
http://www.myfishingadvisor.com/