openNAC - openNAC is an opensource Network Access Control for corporate LAN / WAN environments.
Okta - Enterprise-grade identity management for all your apps, users & devices
FreeRadius - FreeRADIUS is responsible for authenticating one third of all users on the Internet.
OneLogin - On-demand SSO, directory integration, user provisioning and more
Keycloak - Open Source Identity and Access Management for modern Applications and Services.
Ping Identity - Ping Identity provides cloud-based, single sign-on and identity management solutions with their SAML SSO.