Okta - Enterprise-grade identity management for all your apps, users & devices
IdentityServer - An open-source, standards-compliant, and flexible OpenID Connect and OAuth 2.x framework for ASP.NET Core
Perimeter 81 - Simplify secure network, cloud and application access. Perimeter 81’s zero trust Secure Network as a Service and Software-Defined Perimeter technology provide the simplest and highest level of security, for companies of all sizes.
DotNetOpenAuth - DotNetOpenAuth is a free-to-use compiled library that comes with the real support to your site visitor to login with the help of openIDs via getting control of the ASP.NET control onto the page.
OneLogin - On-demand SSO, directory integration, user provisioning and more
Okta Workforce Identity - Okta Workforce Identity is utility software for enterprises that provides a new way of work that enable your employees, contractors, and partners to use technology on any device.