I'm a sucker for behind the scenes of almost anything except how hot dogs are made.
Wes Bos puts out awesome training courses for really nerdy web stuff that even I don't understand most of. And of course for someone who knows as much as he does about web dev/code magic, he doesn't just use an existing app to run the store to sell/giveaway his courses.
Watch the behind the scenes video on YouTube.
https://www.youtube.com/watch?v=4CS436KZ35A