🔑 A small library for generating TOTP and HOTP one-time passwords on iOS.
Enhanced fork of FreeOTP-Android providing a feature-rich 2FA authenticator
**NOT MAINTAINED** Two-factor authentication for Node.js. One-time passcode generator (HOTP/TOTP) with support for Google Authenticator.
Go-Guardian is a golang library that provides a simple, clean, and idiomatic way to create powerful modern API and web authentication.
Highly secure and easy to use OTP client written in C/GTK that supports both TOTP and HOTP
LibreAuth is a collection of tools for user authentication.
multiOTP open source strong two factor authentication PHP library, OATH certified, with TOTP, HOTP, Mobile-OTP, YubiKey, SMS, QRcode provisioning, etc.
A free, secure and open source app for Android to manage your 2-step verification tokens.
Yubikey Manager Qt
Cross-platform application for configuring any YubiKey over all USB interfaces.
One Time Password (HOTP/TOTP) library for Node.js, Deno and browsers.
One Time Password (TOTP and HOTP) library for Clojure. TOTP/HOTP is widely used for Two Factor / Multi Factor Authentication.
A Swift library for generating One Time Passwords (OTP)
A command line HOTP and TOTP client
🔐 A PHP library for generating one time passwords according to RFC 4226 (HOTP) and the RFC 6238 (TOTP)
🔑 One Time Password (OTP) / 2FA for Node.js and Browser - Supports HOTP, TOTP and Google Authenticator
Minimal TOTP generator in 20 lines of Python
Single Sign On server, OAuth2, Openid Connect, multiple factor authentication with, HOTP/TOTP, FIDO2, TLS Certificates, etc. extensible via plugins
Open source two-factor authentication for Android
A one-time password (HOTP/TOTP) library for Java
Python One-Time Password Library
iOS, watchOS, & macOS One-Time Password client
Straightforward password, passphrase, TOTP, and HOTP user authentication
Trustworthy, encrypted, command-line TOTP/HOTP authenticator app with import functionality.
HMAC Based One Time Passwords in PHP. RFC4226 and RFC6238 compliant.
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
HMAC-based (HOTP) and Time-based (TOTP) One-Time Password manager. Works with Google Authenticator for Two-Factor Authentication.
A Web app to manage your Two-Factor Authentication (2FA) accounts and generate their security codes
Apache two-factor (2FA) authentication with Google Authenticator based on Time-based One-Time Password (TOTP) or HMAC-based one-time password (HOTP) Algorithms.
A small and easy-to-use one-time password generator library for Java according to RFC 4226 (HOTP) and RFC 6238 (TOTP).
CrOTP - One Time Passwords for Crystal
Communicate with Nitrokey devices in a clean and easy manner