* [OmniAuth Google OAuth2 Strategy v1.2.2](https://github.com/zquestz/omniauth-google-oauth2) – OAuth2-based authentication strategy for signing users in with Google.

* [OmniAuth SAML v2.2.5](https://github.com/omniauth/omniauth-saml) – Generic SAML strategy for integrating with OmniAuth.