multiOTP open source strong two factor authentication PHP library, OATH certified, with TOTP, HOTP, Mobile-OTP, YubiKey, SMS, QRcode provisioning, etc.

multiOTP Credential Provider is a V2 Credential Provider for Windows 7/8/8.1/10/2012(R2)/2016 with options like RDP only and UPN name support

Yubikey client API library, Challenge-Response & Configuration

This is for setting up a Yubico Passwordless Ubuntu Login or Logins

Alfred workflow for obtaining TOTP codes from a YubiKey

PHP class to authenticate YubiKeys locally (Yubico OTP algorithm), without any dependency (no PEAR, no PECL, no cURL)

Unofficial Elixir client for the classic Yubikey OTP protocol

Go code for working with Yubico keys.

A tool to invalidate accidental Yubikey presses

PHP class to authenticate YubiKeys on YubiCloud, without any dependency (no PEAR, no PECL, no cURL)

PHP 7/8-friendly alternative to the official php-yubico client

Runs a command on receipt of a valid yubikey OTP

Bash-toolbox-for-Huawei-LTE-API

A collection of classes to provide second factor authentication like Yubico OTP (Yubikey), Oath (TOTP, HOTP, GoogleAuthenticator) server-side written in PHP.

Yubico dart library for Dart/Flutter

AD FS Multi-Factor Authentication Provider using Yubico OTP

An implementation of the Yubico Validation Protocol.

modhex encoding/decoding used by Yubico-OTP Authentication

A YubiKey batch configuration tool for the YubiKey Manager, written in Powershell

Go implementation of yubikey-val