With this gem you will be able to use debitoor as a provider in your omniauth configuration

An OmniAuth strategy for authenticating with the Eloqua REST API.

oAuth2 provider wrapper for FaceIt

Facebook AccountKit Strategy for OmniAuth

Force.com strategies for OmniAuth.

Provides access_token only callback phase

An OmniAuth strategy for authenticating with the Heap API.

An OmniAuth strategy for HomeAway OAuth2 identification.

An OmniAuth strategy for authenticating with the HubSpot API.

An OmniAuth strategy for the Instagram API with Instagram Login (https://developers.facebook.com/docs/instagram-platform/instagram-api-with-instagram-login)

Official OmniAuth strategy for Jumpseller

OmniAuth strategy for Kit

Logikura OAuth2 Strategy for OmniAuth

MAPS.ME passport strategy for OmniAuth, complete with regual and access token strategies

Omniauth strategy for Namecheap

Omniauth Strategy for plangrade. Find out more about the plangrade API at http://docs.plangrade.com

OmniAuth strategy for qiita

Rivo OAuth 2 strategy for OmniAuth

Allows your application to integrate with Rocket Chat through their "Third-party login" feature.

A Seznam.cz strategy for OmniAuth. This allows you to login via Seznam.cz with your ruby app.