Apache UserGrid - Usergrid is an open-source BaaS enabling developers to rapidly build web and/or mobile applications.
Keycloak - Open Source Identity and Access Management for modern Applications and Services.
Baqend Platform - Baqend is a Backend-as-a-Service for web and mobile apps.
CAS - Apereo CAS - Enterprise Single Sign On for the Web
ApiOmat - ApiOmat is a Mobile Backend as a Service enabling organizations to integrate their enterprise IT systems with mobile devices and wearables.
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.