外部认证中间件 (Middleware for external Authentication)

Microsoft Katana

• WS-Federation
• OpenID Connect
• Google
• Twitter
• Microsoft Account
• Facebook

SAML2p

• KentorIT Authentication Services - 参见 这个 博客

其它社区贡献 (Other community contributions)

• OWIN OAuth Providers (Google+, Yahoo, LinkedIn, GitHub, Instagram, StackExchange, Battle.net…)