thinktecture 

Helper library for claims based identity & access control in .NET.

Helper library for identity & access control in .NET 4.0/WIF and .NET 4.5 (includes MVC4 and Web API support).

Client library of Thinktecture.IdentityModel. Includes OAuth2 and OpenID Connect client and helpers for parsing token and authorize responses, Epoch Time helpers, extensions methods for HttpClient.

OWIN middleware for providing a resource/action based authorization manager.

Web API intgration package for resource/action based authorization.

OWIN middleware for HTTP Basic Authentication in OWIN/Katana applications.

MVC intgration package for resource/action based authorization.

Helper library for claims based identity & access control in OWIN/Katana based applications.

Helper library for claims based identity & access control in ASP.NET Web API v2.

OWIN middleware for doing claims transformation in OWIN/Katana applications.

Thinktecture IdentityServer Core Libraries for Re-Hosting (for IdentityServer v2)

Helper library for claims based identity & access control in ASP.NET and MVC5.

Embedded and easy to use WS-Federation STS for ASP.NET with minimal configuration. Can be used as a replacement for the deprecated "Identity and Access Control" Visual Studio extension.

Scope-based Authorization for Web API v2.

OWIN middleware for validating OAuth2 and OpenID Connect scope claims.

WS-Trust helpers and bindings for WCF

OWIN middleware for requiring SSL connections and client certificates.

Delegation Handler based Authentication Framework for ASP.NET Web API v2.

OWIN middleware for authenticating X.509 client certificates in OWIN/Katana applications.

Implementation of the Hawk authentication scheme for Web API v2 and Katana.