CloudFoundry User Account and Authentication (UAA) Server
The authentication glue you need
An open-source Identity and Access Management (IAM)
Identity and access management for modern applications and services
MaxKey SSO ,Leading-Edge IAM-IDaas(Identity and Access Management)
Kanidm: A simple, secure, and fast identity management platform
Doorkeeper is an OAuth 2 provider for Ruby on Rails / Grape
Next-gen identity server with Ory-hardened authentication
All-in-one Kubernetes access manager
Identity management and federations integration
Enterprise IDaaS/IAM platform system
Identity4J is a suite of Java Identity and Authentication Connectors
Access Management and Single Signon platform
The Identity Manager provides a solution to manage the user life cycle