Apereo CAS - Identity & Single Sign On for all earthlings and beyond.
OpenID Connect (OIDC) identity and OAuth 2.0 provider with pluggable connectors
Node.js library for SAML SSO
Login.gov Core App: Identity Provider (IdP)
Simple SAML Identity Provider (IdP) for Node
This is a MongoDB provider for the ASP.NET Core 2 Identity framework
[UNMAINTAINED] Serverless Authentication as a Service (AaaS) provider built on top of AWS Cognito
Ruby SAML Identity Provider, best used with Rails (though not required)
Apache Syncope
Lightweight SAML Identity Provider
A centralized login and SSO application to authenticate several websites and mobile apps.
Building blocks for servers implementing Simple Cloud Identity Management v2
Spring Boot OAuth 2.0 & OpenID Connect Identity Provider / Authorization Server
Mountable Rails engine that provides OpenID server/identity provider functionality
Get up and running quickly with Okta's OAuth as a Service and your favorite API Gateway.
Projeto Login Cidadão
ASP.NET Core Identity Provider for NHibernate
A ranked list of awesome Digital Identity open source projects
IdentityServer 4 implementation acting as SAML 2.0 IdP and SP
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