CourseLab is a good Authoring tool.
Version 2.4 is free.
CourseLab is a powerful, yet easy-to-use,
e-learning authoring tool that offers programming-free WYSIWYG environment for creating high-quality interactive e-learning content which can be published on the Internet, Learning Management Systems (LMS), CD-ROMS and other devices.
And it is FREE
and now CourseLab 2.6 is a Commercial version.
link to the software :