The Figo Python SDK by Figo interacts with the Connect API to implement banking features into applications. Available 2 demos on GitHub. One shows a console with API access and the other one displays web demo with OAuth authentication.
Take Twitter, add its concepts as a platform to banking and you get BankSimple, the unlaunched startup that you will definitely want to keep your eye on. BankSimple is a new take on online banking created by Twitter's former API guy, Alex Payne. BankSimple is aiming to create a banking platform, much as Twitter became a messaging platform.