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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.

LemonlLDAP::NG is a modular Web-SSO based on Apache::Session modules. It simplifies the build of a protected area with a few changes in the application. It manages both authentication and authorization and provides headers for accounting. So you can have a full AAA protection for your web space as described below.

HybridAuth A PHP Library for authentication through Facebook, Twitter, Google, Yahoo, MySpace, LinkedIn, AOL, Vimeo, FourSquare, OpenID and other Identity providers

Avatier's suite of products address Identity and Access Management challenges by providing a complete identity access and asset risk management solution. It solves Provisioning, Governance, Risk and Password Management issues with a unique intuitive approach. The IT Store allows users to "shop" for access and assets similar to shopping online. Avatier has the fastest time-to-value of any IAM solution available today because of its unique web-based configuration approach, so the solution can be deployed quickly in even the most complex environments. There are over 100 connectors and growing, so the solution can provide IAM connectivity to all of your systems. »

Centrify provides Unified Identity Services across data center, cloud and mobile — resulting in one single login for users and one unified identity infrastructure for IT. Centrify's software and cloud services let organizations securely leverage their existing identity infrastructure to centrally manage authentication, access control, privilege management, policy enforcement and compliance across on-premise and cloud resources. More than 5,000 customers have deployed Centrify across millions of servers, workstations, and applications. With Centrify, organizations are reducing their costs associated with identity lifecycle management and compliance by over 50%. »

OpenAM provides open source authentication, authorization, entitlement and federation software. Through OpenAM, the community actively continues development of OpenSSO.