Open Source Identity Broker/Bridge

Hi folks,

I would like to build an open source identity broker/bridge that allows Solid IdPs to deploy a bridge in front of their servers to enable Google, Facebook, GitHub etc. authentication with Solid IdPs.
Has there been any similar efforts? Is this something that can be of use for anyone else? With whom can I coordinate to make it useful for existing Solid IdPs?

Thanks and any pointers are much appreciated
Best Jan