Ask HN: Is there an open source variant of CodeSchool/Udacity type systems?

Maybe Google's Course Builder

https://code.google.com/p/course-builder/

Thanks I'll have a look.

This is probably a better question for StackOverflow.

Also, what do you think is better, running server side code tests or just client side regex validations?

We (Code School) actually run all of our tests server side, even for courses like Mobile Web and Backbone.js. We do this because we don't want to deal with the headache of dealing with cross-browser issues. For Javascript or HTML/CSS related courses we use either Node.js with jsdom or Node.js with phantomjs (we started with jsdom but now use phantomjs for these courses). It makes everything more reliable, and we can always assure the consistency of testing the submitted code.

That's what I expected. Mind if we start a discussion via email?

Suggestions for gamification systems you've used will also be helpful