Password.link might be a bit more popular than DotNetOpenAuth. We know about 1 link to it since March 2021 and only 1 link to DotNetOpenAuth. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
But if the OpenID server would be for a intranet or low number of requests, you can go ahread (in my opinion) and the post also recommends http://dotnetopenauth.net/ because has a OpenID provider and samples. Source: over 2 years ago
Keeper Security is an alternative that works with company SSO. Otherwise use a one time service like https://password.link/. Source: about 3 years ago
ASP.NET Identity - ASP.NET Identity is a membership-based software system designed for the authentication and authorization of the users via building an ASP.NET application.
One-Time Secret - One-Time Secret is a way to share sensitive information simple and secure.
ASP.NET SAML - ASP.NET SAML is an open-source authentication utility that has been used for exchanging authentication and authorization data between the channels.
Password Pusher - Go Ahead. Email Another Password.
IdentityServer - An open-source, standards-compliant, and flexible OpenID Connect and OAuth 2.x framework for ASP.NET Core
1ty.me - If you need to send a password or some other form of simple but sensitive information to someone...