I published a number of open source projects around authentication, authorization and claims-based identity.
Thinktecture.IdentityServer
Light-weight security token service based on .NET, WIF, MVC and WCF.
Github
Thinktecture.IdentityModel
Helper library for identity & access control in WIF/.NET 4.5 (Also includes the MVC4 and Web API extensions).
GitHub / Nuget
Thinktecture.IdentityModel.Web
Authentication & Authorization Extensions for WCF Web Programming Model (based on WIF)
Github Nuget
