Microsoft Learning Content Development System
This is a free content authoring system that is incredibly easy to use. If you have made PowerPoint slides, you can rapidly make a Tutorial (Learning Object). Strongly recommended if you want to try your hand at making a tutorial. Even after you get started, you may find yourself coming back to this often. Creates SCORM Compliant modules.
A free learning object authoring system developed by the University of Nottingham, UK. The biggest stumbling block is getting use to the interface. Give yourself more time to learn how to make effective tutorials. Creates SCORM Compliant modules.
NOT FREE! Powerful, but cumbersome. There are far more features than can be found in the previous two, but there is a longer learning curve. Recommended for people with more experience, and who want to create slick learning objects. There are lots of options that can distract novices.
ToolBook by Sum Total System
NOT FREE! Incredibly powerful, expensive, and far too time consuming for most teachers. This is a great product if you have people who are going to dedicate time to building incredibly slick learning objects. I would not recommend this for teachers/instructors, but would recommend for those IT people working in instructional design. SCORM requires some coding, and I never got the final module to integrate into D2L or MOODLE (with time, I think I could have figured it out).