I've used Upcase extensively over the years to learn things like TDD and VIM. It's one of the few resources out there for people who already know programming fundamentals and want to get to the next level. I happily paid for it for a long time so it's exciting that now it's free!
Hey there, I'm Chris, one of the thoughtbotters who helped build Upcase over the years. We're all super excited to take this step and share Upcase with the world, and I'm more than happy to answer any questions you all might have.