openNAC - openNAC is an opensource Network Access Control for corporate LAN / WAN environments.
Keycloak - Open Source Identity and Access Management for modern Applications and Services.
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.
SpotOn WiFi - Get more positive reviews from real customers and get more guests automated with SpotOn: the best all-in-one WiFi Marketing platform for SMBs.
PacketFence - PacketFence is a Free and Open Source network access control (NAC) system.
FusionAuth - FusionAuth is a CIAM platform that is 100% free for unlimited users.