FavColor server

A demo app for a variety of identity technologies, including OAuth 2, OpenID COnnect, and Persona.

favcolor.net

Integrates with the Google, Microsoft, Facebook, and Mozilla Persona IDPs.
Mostly OAuth 2.0-based, except for Facebook is subtly incompatible and Persona is something completely different.

favcolor.net/gat

Integrates with the Google “Identity Toolkit” software, which takes care of all the user management stuff, including passwords, recovery, and federation with lots of IDPs.

components

This is the server side of the code, a Ruby/Sinatra thing which uses filesystem storage with some help from memcached.

Also, there’s an Android client at https://github.com/google/favcolor-android and an iOS client at https://github.com/google/favcolor-android