I've been diversifying my professional skillset recently, branching out from the CMS/framework Drupal to a new system called Node.js. I'll spare the readers of this blog the technical details - I covered them at length in a recent post on my tech blog.
But the first app I built shoots two birds with one stone: it's a Spanish flashcards app. You can play here. (Or if you're a coder, check out the tech post and the code on Github.)