What it is: online hub for your free and paid content, with gamification
Why you need it: hosting courses, linking to your services, a binge and buy marketplace, offering students bonus modules based on how many points they rack up. You set your price, frequency of payment, and there's no transaction fee. The binge & buy marketplace is especially nice if the thought of launching makes you queasy.
Where to get it: http://bit.ly/mv369 [aff]
See it in action: you're in it right now lol
Investment: FREE for first 50 users, $39/mo 51-1000 users
Black Friday Deal? Sorta: through the end of the year, they have bumped all account levels up to 250,000 students. So if you're hustling, you don't have to worry about going over limit AND sell enough to pay for your account once the promotion is over.
NOTE: when you sign up, look for "Golden Hamster" in your welcome email, then do it. It comes with perks, even if you're on the free plan.