HybridAuth!

10Duke Identity Provider is an enterprise identity management solution, provides seamless SSO access, supports federated identity, AD, Azure AD, LDAP, social sign-in and others.

LoginRadius’ Customer Identity and Access Management (cIAM) platform helps companies deliver a connected customer experience by streamlining the registration and login processes for their web,mobile, and other digital properties. Organizations can increase registrations, improve customer experience, consolidate customer data, and leverage customer profiles to increase revenue through targeted and personalized marketing campaigns.

You can connect any application (written in any language or on any stack) to Auth0 and define its Connection, the method used to authenticate the users of that application:

The Shibboleth software implements widely used federated identity standards, principally the OASIS Security Assertion Markup Language (SAML), to provide a federated single sign-on and attribute exchange framework.

Janrain provides hosted user management solutions for social login and sharing, single sign-on and social profile storage.

Gigya is one of the leading social choice for websites, integrating online businesses with the top social networks such as Facebook, Twitter and LinkedIn and consolidating the most powerful social features in a single solution.

OmniAuth is a flexible authentication system utilizing Rack middleware.

Powerful authentication, authorization, and user management for any application

Bitium is a provider of cloud-based identity and access management solutions, including single sign-on, password management, and analytics for small, medium and enterprise businesses. Founded in 2012, the company aims to give growing companies the ability to manage access to all of their web-based applications -- including Google Apps and Office 365, as well as social networks and CRM, collaboration and marketing tools -- in one place without hindering employee adoption of these applications. Organizations such as GroupM, Fullscreen, Movember and Demand Media use Bitium for an easy-to-use solution that delivers increased flexibility and security. To learn more about Bitium, please visit www.bitium.com . »

The ultimate contacts importer and tell-a-friend system for your website. Allow your website visitors to import and invite their contacts to your website from various webmail and social network services around the world. With the help of AdiInviter Pro, your website visitors can import and invite their contacts to your website from Google, Facebook, Twitter, Yahoo, Outlook, Linkedin, AOL, iCloud, Viadeo, MailChimp, GMX, T-online, Web.de and many other services.