OmniAuth Oauth2 strategy for fitbit.com - https://dev.fitbit.com/docs/oauth2/

OmniAuth strategy for Flickr

Unoficial OmniAuth strategy for Freee.

FreshBooks OAuth strategy for OmniAuth

OmniAuth strategy for GitHub Team Auth.

Harvest strategy for OmniAuth

OmniAuth strategy for Hatena

ID.me strategy for OmniAuth

An Infusionsoft OAuth2 strategy for OmniAuth

Intercom OAuth2 Strategy for OmniAuth

OmniAuth strategy for Jawbone.

Latvija.lv authentication strategy for OmniAuth

Official OmniAuth strategy for Linear.

Mediawiki OAuth strategy for OmniAuth 1.0a

A MercadoLibre OAuth2 strategy for OmniAuth 1.x

Official OmniAuth strategy for MyMLH.

OmniAuth strategy for Moves.

An extension to omniauth-saml for handling multiple identity providers

Using OAuth2 to authenticate wechat user when web resources being viewed within wechat(weixin) client.

Using OAuth2 to authenticate wechat user in web application.