I stumped upon this site recently and I find it very intuitive and easy to use. The good thing about BrainCert.com is that it allows even a free user to create and sell tests, courses and classes allowing us to keep 90% of the revenue. I have also used udemy and coursera, and even though BrainCert seem to have just relaunched their new website, I see a great potential for online learning and teaching. Especially, the BrainCert Virtual Classroom is the best I have used so far. I am using their virtual classroom to teach my own kids when I am traveling. It's great for home schools, instructors to earn revenue by sharing knowledge, or teachers like me who work from home. BrainCert is super simple to use, and nothing comes close to their test engine that anyone can use to create sophisticated and awesome online tests. What an amazing tool this is. Great site.