OpenID - OpenID is a safe, faster and easier way to log in to web sites.
Keycloak - Open Source Identity and Access Management for modern Applications and Services.
OAuth - OAuth is an open standard for authorization. It allows users to share their private resources (e.g.
Shibboleth - standards based, open source software for web single sign-on across or within organizational...
Portier - An email-based, passwordless authentication service that you can host yourself.
CAS - Apereo CAS - Enterprise Single Sign On for the Web