As Marcus said the best ones are paid for, but I am in the same boat as you and nobody wants to pay for software.
So here is my rundown of freebies
4th Place - eXe, really difficult and primitive in my own experience, if you have the time and patience I am sure it could be fantastic
3rd Place - Microsoft LCDS, can be very buggy but free, issues with displaying in moodle
2nd Place - Courselabs scorm creator, ok software but for any support you need to buy the latest version from them instead of using their free software
1st Place - Ispring ppt to scorm creator in conjunction with moodles own tools.