Keycloak - Open Source Identity and Access Management for modern Applications and Services.
JumpCloud - Cloud-based directory services. Alternative to Microsoft Active Directory.
Shibboleth - standards based, open source software for web single sign-on across or within organizational...
Foxpass - Foxpass manages users, groups, and SSH keys (plus a LDAP and RADIUS interfaces) to increase an organization's server and network security.
HybridAuth - HybridAuth A PHP Library for authentication through Facebook, Twitter, Google, Yahoo, MySpace...
SecureLink for Enterprise - Privileged Access Management