If you go down the API route, Flask-Restless[0] and simpleapi[1] are also worth a look.

[0] http://readthedocs.org/docs/flask-restless/en/latest/ [1] https://github.com/flosch/simpleapi

Is there any of this solution that bundles with an easy mobile library/sdk? I was asking for something like a semicomplete backend opensource solution here http://news.ycombinator.com/item?id=3735387 but unfortunately I got no responses