You'll find them on the Web. To answer this question, you must first understand the business model that these sites are built upon. The free courses are essentially content that is designed to lure customers to the site. The sites make money from the value-added products and services they sell to corporate and individual customers and from advertising revenue. Let's explore a few of these sites see what's free and what isn't.
All courses are self-paced.
I browsed the business plan course developed by The Mississippi State University Extension Service. It's well organized, complete with topic outline, annotations and links to worksheets. However, it is text-based and lacks the necessary learning components such as objectives, practice, feedback, and testing in order to be considered a course. But it is free. I also previewed a tutorial on Macromedia DreamWeaver, an HTML editing and web management program.