Top 5 authn open source projects

An Identity and Access Management (IAM) / Single-Sign-On (SSO) platform with web UI supporting OAuth 2.0, OIDC, SAML and CAS, QQ group: 645200447

vault-auth-spire is an authentication plugin for Hashicorp Vault which allows logging into Vault using a Spire provided SVID.

Go client SDK for Casdoor

ASP.NET Core Blazor BFF with Azure AD and Razor page

Command line utility for interacting with OAuth2 infrastructure to generate tokens