Google Auth Library for Node.js
Apereo CAS WAR Overlay template
The Single Sign-On Multi-Factor portal for web apps
Identity & Single Sign On for all earthlings and beyond
Secure Backend Server for Web, Mobile & Flutter Developers
MaxKey SSO ,Leading-Edge IAM-IDaas(Identity and Access Management)
FIDO® Certified StrongKey FIDO Server (SKFS)
PHP strong authentication library, web interface & CLI, OATH certified
Zentyal is a Linux Small Business Server
apache cookie SSO mechanism.
Apache LDAP Directory Manager
Two-factor authentication system
Authentication, Access Control, and Single Sign-On
Open Source Web Single Sign-On
Single Sign On module for Apache and NGiNX