There are 3 repositories under multifactor topic.
Vulnerable OTP/2FA Application written in PHP using Google Authenticator
This article will teach you how to secure a React.js app by implementing two-factor authentication (2FA) feature using TOTP tokens generated by Google Authenticator, Authy, or Chrome's Authenticator extension
Valorant API wrapper for nodejs
a tiny-mfa implementation written in go
A Rust library for working and verifying YubiKey OTPs
Enables multi-factor authentication (MFA) for .NET Framework applications. Supported authentication methods: WebAuthn/U2F Security Keys, Mobile Push, Mobile Passcodes (TOTP), SMS Passcodes, Email Links.
Keystroke Biometrics Multifactor Authentication