Nice sandbox for quick tests. Can we add backbone and knockout.js? Or a simple method to add scripts on demand? Although it's easy to over-engineer things -- Simple is probably a good thing. =)
Coworker here, thanks for the suggestions! We are definitely planning on a more dynamic selection of libraries. What we hope to avoid is an interface that has too many initial options, slowing down users who want to quickly use one of the 'default' libraries.