Top SSO GitHub Repositories & Tools (2026)

The most comprehensive authentication framework

Desktop app to download audio/video from hundreds of sites

A next-gen FOSS self-hosted unified zero trust secure access platform that can operate as a remote access VPN, a ZTNA platform, API/AI/MCP gateway, a PaaS, an ngrok-alternative and a homelab infrastructure.

🧑‍🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.

Single Sign-On Identity & Access Management via OpenID Connect, OAuth 2, PAM

A reverse proxy that provides authentication with Google, Azure, OpenID Connect and many more identity providers.

A lightweight, pure-Swift library for downloading and caching images from the web.

The tiniest OpenID Certified™ authorization and authentication server you have ever seen.

Apereo CAS - Identity & Single Sign On for all earthlings and beyond.

Accept Bitcoin payments. Free, open-source & self-hosted, Bitcoin payment processor.

qpdf: A content-preserving PDF document transformer

A framework for building messaging apps with .NET and C#.

🔐 Authentication, Authorization, and Accounting (AAA) App and Plugin for Caddy v2. 💎 Implements Form-Based, Basic, Local, LDAP, OpenID Connect, OAuth 2.0 (Github, Google, Facebook, Okta, etc.), SAML Authentication. MFA/2FA with App Authenticators and Yubico. 💎 Authorization with JWT/PASETO tokens. 🔐

Self-hosted image hosting and sharing platform with private links, collections, S3/SMB storage, OIDC SSO and ShareX support.

C++ Library for Audio Digital Signal Processing

A jq-like Markdown query language for command-line processing

Clean Architecture for Android - a sample project

OpenID/Connect, OAuth2, WS-Federation and SAML 2.0 server based on Duende IdentityServer and ITFoxtec Identity SAML 2.0 with its admin UI

The Janssen Project is a home for open source IAM components, featuring Auth Server (OAuth/OpenID), Agama low-code identity orchestration, and the Cedarling policy decision point. The "Janssen Server" distributions bundle IAM components under one control plane.

Stroom is a highly scalable data storage, processing and analysis platform.