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.
CAS - Apereo CAS - Enterprise Single Sign On for the Web
Portier - An email-based, passwordless authentication service that you can host yourself.
Webroot - Webroot delivers multi-vector protection for endpoints and networks and threat intelligence services to protect businesses and individuals in a connected world.