Udemy continues to offer a selection of online courses for free. Each course includes hours of content and most are by far the best deals we could find for such classes. Here's a few interesting ones:

Kindle Secrets: How I Wrote a Best Selling eBook In 72 hours for free

Web Design for Web Developers: Build Beautiful Websites! for free

Learn Linux: Basics to Advance for free

Introduction to Cloud Computing for free (pictured)