Top AUTH GitHub Repositories & Tools (2026)

The Firebase SDK for Unity

An Erlang OAuth 1.0 implementation

NestJS Authentication without Passport using Bcrypt, JWT and Redis

🔒 Keycloak Authentication Provider implementation to get a two factor authentication with a OTP/code/token send via Email (SMTP, SendGrid, AWS SES, Mailgun)

Documentation sites for Python packages: start simple, go deep

⏰ The open-source time tracking app for individuals.

Powerful authentication system for Laravel 12 and 13 - Login, Registration, Forget Password, Email Verification, OTP, TOTP, Captcha, Brute Force Lockout, 5 Layouts, Dark & Light Themes, Email templates, Fully Configurable, Social Login. Comes with Excellent Documentation.

A set of RSpec matchers for testing Pundit authorisation policies.

OpenID 2.0 authentication middleware for ASP.NET Core

JWT Token support for Doorkeeper

Secure agents in seconds with permissions enforced at runtime.

A secure, high-performance, multi-tenant platform for remote App ”Hosting“ and ”Computing“

Official JavaScript repository for Clerk authentication

Ruby toolkit for Auth0 API

Goiabada is an OAuth2 / OpenID Connect server written in Go.

Auth0 SDK for Angular Single Page Applications

Easy to use OpenID Connect client and server library written for Go and certified by the OpenID Foundation

OpenCode plugin for ChatGPT Plus/Pro OAuth with Codex/GPT-5 routing, multi-account rotation, account switching, health checks, diagnostics, and recovery tools

Duende's Free and Open Source software.

This is an Android project allowing you to use the advanced biometric authorization features.