Spine -- A lightweight framework for building JavaScript web applications
Seems neat, but it would have been nice to differentiate itself from backbone a little more upfront.  The sites even look similar.The key architectural difference seems to be that the ui is updated before the server responds, which is great in a single user situation, but can get pretty inconsistant once you're in a multi user app.I do have to say that I like the patterns section at the end, it's always good to see a prescription for how you would use a library or framework.