The VKontakte Python SDK by Kirill allows developers to integrate the VKontakte API into their Python applications. This SDK works with Python 2.7, 3.4, 3.5, and 3.6. Documentation is provided in Russian.
There have been a lot of new socially based mashups showing up recently. In fact, we recently topped 700 social mashups. While many of these use the Facebook API or Twitter API, there are many more social APIs. The mashups below run the gamut, though, yes, also include Facebook.
Strutta provides a platform to "engage your audience and convert fans to customers." It does this by launching and managing contests, sweepstakes, coupons, promotions, and by providing the Strutta API. For example, Crate & Barrel ran a wedding contest to drive couples to set up their wedding registries at the company, and featured friends and families of the contestants voting on the results to generate increased customer involvement.