Open Source Single Sign-On Server Keycloak (Red Hat Single Sign-On) Red Hat: Open source: Yes: Federated SSO (LDAP and Active Directory), standard protocols (OpenID Connect, OAuth 2.0 and SAML 2.0) for Web, clustering and single sign on. Red Hat Single Sign-On is version of Keycloak for which RedHat provides commercial support. lemonLDAP-NG

AspNet.Security.OpenIdConnect.Server (ASOS) ASOS is a low-level, protocol-first OpenID Connect server framework for ASP.NET Core and OWIN/Katana. Gluu Server: Enterprise ready, open source software for identity, access management (IAM), and single sign-on (SSO). For more information, see the Gluu Product Documentation. IdentityServer Open source alternative for multi-factor authentication Mar 13, 2020 GitHub - apereo/cas: Apereo CAS - Enterprise Single Sign CAS is an open and well-documented authentication protocol. The primary implementation of the protocol is an open-source Java server component by the same name hosted here, with support for a plethora of additional authentication protocols and features. Open-source FIDO Server to Enable Passwordless Authentication The availability of free, open-source, community-supported, standards-compliant FIDO2 server software makes it easy to integrate data security and privacy into existing or new authentication systems.” The open-source FIDO server is available on Github. This project is currently licensed under the GNU Lesser General Public License v2.1.

Open Source - Auth0

The Gluu Server is a free open source identity and access management platform for single sign-on, mobile authentication, and API access management that includes a comprehensive implementation of an OpenID Connect Provider and Relying Party Target Environment: The Gluu Server OpenID Provider is written in Java.

Yubico provides developers with the Yubico OTP Validation Server and the Yubico U2F Validation Server to enable rapid integration of the YubiKey functionality into an existing web site or service. Included is free open source software with the required source code and tools for …

JOSSO is an open source identity and access management solution focused on streamlining implementations through a visual modeling and generative approach. Founded in 2004, it is used by around 4,000 organizations worldwide. Main Features. Advanced Administration console — Fully visual configuration, rollout and management Open Source Shiny Package The ShinyProxy only uses functionality that is available in the open source R package and does not rely on any server version of Shiny. This allows for a clean separation between the statistical/business logic in R and the management of the applications in ShinyProxy. Gluu's open source authentication & API access management software for securing Web & mobile applications using open standards like SAML & OpenID Connect. Its features include Single Sign-On, Access Management, OAuth, Multi-Factor Authentication, LDAP Directory Integration, User Management and lot more.