Okta - Enterprise-grade identity management for all your apps, users & devices
Oracle Identity Manager - Oracle Identity Management enables oganizations to effectively manage the end-to-end lifecycle of user identities across all enterprise resources.
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.
JumpCloud - Cloud-based directory services. Alternative to Microsoft Active Directory.
OneLogin - On-demand SSO, directory integration, user provisioning and more
Ping Identity - Ping Identity provides cloud-based, single sign-on and identity management solutions with their SAML SSO.