Keycloak - Open Source Identity and Access Management for modern Applications and Services.
OneLogin - On-demand SSO, directory integration, user provisioning and more
CAS - Apereo CAS - Enterprise Single Sign On for the Web
Janrain - Janrain is customer relationship management (CRM) software and service designed to obtain user identities.
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.
AuthAnvil - AuthAnvil software is an integrated identity and access management tool designed to help IT managers service their networks, infrastructure network, and ensure that devices are safe and secure at all times. Read more about AuthAnvil.