List of Open source SSO solutions available

Here’s a list of open-source Single Sign-On (SSO) solutions available:

1. Keycloak

• Description: An open-source Identity and Access Management (IAM) solution developed by Red Hat.
• Features: Supports OAuth 2.0, OpenID Connect, SAML, LDAP, Active Directory integration, multi-tenancy.
• GitHub: Keycloak Repository

2. Gluu Server

• Description: An enterprise-ready open-source IAM solution that supports OAuth 2.0, OpenID Connect, and SAML.
• Features: Strong authentication, adaptive authentication, support for multi-factor authentication (MFA).
• Website: https://gluu.org/

3. Authelia

• Description: A modern authentication and SSO server designed for secure access to web applications.
• Features: Supports 2FA, OpenID Connect, LDAP, proxy authentication.
• GitHub: Authelia Repository

4. LemonLDAP::NG

• Description: A modular authentication and access management web SSO solution.
• Features: Supports LDAP, SAML, OpenID Connect, CAS, MFA.
• GitHub: LemonLDAP Repository

5. WSO2 Identity Server

• Description: A robust IAM solution that supports SAML, OpenID Connect, and OAuth.
• Features: API security, multi-factor authentication, user federation.
• Website: https://wso2.com/identity-server/

6. CAS (Central Authentication Service)

• Description: A widely used authentication system originally developed by Yale University.
• Features: Supports SAML, OpenID Connect, OAuth, MFA.
• GitHub: CAS Repository

7. ORY Hydra

• Description: A lightweight OAuth 2.0 and OpenID Connect authentication server.
• Features: Designed for microservices, Kubernetes-friendly, secure OAuth implementation.
• GitHub: ORY Hydra Repository

8. FusionAuth (Community Edition)

• Description: A developer-friendly authentication and IAM solution.
• Features: Multi-tenant support, passwordless authentication, SAML, OpenID Connect.
• Website: https://fusionauth.io/

9. OpenIAM

• Description: A full-featured IAM platform for authentication, authorization, and user management.
• Features: SSO, multi-factor authentication, user provisioning.
• Website: https://www.openiam.com/

10. OpenUnison

• Description: An open-source identity gateway that supports SSO.
• Features: Supports LDAP, SAML, OpenID Connect, MFA, Kubernetes integration.
• GitHub: OpenUnison Repository

11. SimpleSAMLphp

• Description: A PHP-based implementation of SAML for authentication and SSO.
• Features: Identity provider (IdP) and service provider (SP) support, LDAP integration.
• GitHub: SimpleSAMLphp Repository

Would you like any specific recommendations based on your use case?