* [PocketBase v0.39.0](https://github.com/pocketbase/pocketbase) – Go backend with an embedded database, real-time subscriptions, user management, and a simple API.

* [SaaS Boilerplate v1.8.0](https://github.com/ixartz/SaaS-Boilerplate) – Customizable template for building SaaS applications with essential features and a modern tech stack.

* [auth0-react v2.17.0](https://github.com/auth0/auth0-react) – Auth0 SDK for integrating authentication in React Single Page Applications.

* [supabase-py v2.30.0](https://github.com/supabase/supabase-py) – Python client for interacting with Supabase services like authentication, file storage, and real-time data.

* [Nhost constellation@0.5.0](https://github.com/nhost/nhost) – Open source alternative to Firebase that provides a GraphQL API and various backend services.

* [ZeroID v1.6.0](https://github.com/highflame-ai/zeroid) – Identity infrastructure that issues verifiable agent credentials, enforces delegated on-behalf-of chains, and enables real-time revocation.

* [Better Auth v1.6.14](https://github.com/better-auth/better-auth) – Framework-agnostic authentication and authorization library for TypeScript with a plugin ecosystem for advanced features.

* [codex-multi-auth v2.2.0](https://github.com/ndycode/codex-multi-auth) – Multi-account OAuth manager for the official Codex CLI with resilient routing, quota-aware rotation, and terminal-first diagnostics.

* [Tyro Login v2.8.0](https://github.com/hasinhayder/tyro-login) – Customizable Laravel 12 authentication UI and features with multiple layouts, social logins, OTP, captcha, and email workflows.

* [oc-codex-multi-auth v6.2.0](https://github.com/ndycode/oc-codex-multi-auth) – OpenCode plugin enabling ChatGPT Plus/Pro OAuth access, GPT-5/Codex model presets, multi-account rotation with failover, and guided setup.

* [ThunderID v0.41.0](https://github.com/thunder-id/thunderid) – Lightweight IAM engine securing access for humans, AI agents, and machines, supporting decentralized identity and post-quantum-ready security.

* [Logto v1.40.1](https://github.com/logto-io/logto) – Modern auth infrastructure supporting OIDC, OAuth 2.1, multi-tenancy, SSO, and RBAC for SaaS and AI applications.

* [ruby-auth0 v5.20.0](https://github.com/auth0/ruby-auth0) – Ruby API client for the Auth0 platform.

* [TOUGHRADIUS v9.0.1](https://github.com/talkincode/toughradius) – Powerful RADIUS server with RadSec support and a modern Web management interface for ISPs and enterprises.

* [Cosmos v0.22.19](https://github.com/azukaar/Cosmos-Server) – Secure self-hosted home server solution for managing applications with built-in security and ease of use.

* [Frontier v0.104.0](https://github.com/raystack/frontier) – Identity and access management platform with user, organization, project, group, authentication, authorization, billing, auditing, and reporting features.

* [Kinde React 5.12.0](https://github.com/kinde-oss/kinde-auth-react) – SDK for React to manage frontend authentication flows.

* [Descope SDK for Node.js v2.6.0](https://github.com/descope/node-sdk) – Node.js SDK providing backend access to user management and authentication APIs.

* [caddy-jwt v1.2.0](https://github.com/ggicci/caddy-jwt) – Caddy HTTP module providing JWT-based authentication for HTTP handlers.

* [OAuth 2.0 Authorization Framework v2.0.19](https://github.com/ruby-oauth/oauth2) – RubyGem for implementing OAuth 2.0 clients with support for various authorization flows.

* [@passwordless-id/webauthn 2.4.0](https://github.com/passwordless-id/webauthn) – Helper library simplifying WebAuthn/passkeys usage with client, server and demo components.

* [react-apple-signin-auth 1.2.0](https://github.com/a-tokyo/react-apple-signin-auth) – Apple signin integration for React using the official Apple JavaScript SDK.

* [Pinniped v0.46.0](https://github.com/vmware/pinniped) – Identity services for Kubernetes enabling easy integration with external identity providers and unified login across clusters.

* [Akamai OPEN EdgeGrid for GoLang v13 v13.2.0](https://github.com/akamai/AkamaiOPEN-edgegrid-golang) – Go library that signs HTTP requests using the EdgeGrid authentication scheme and provides Akamai REST API support.

* [WSO2 Thunder v0.37.0](https://github.com/asgardeo/thunder) – Go-based identity management service with a flexible identity flow designer for authentication, registration, and recovery across applications, services, and AI agents.

* [ThunderID v0.37.0](https://github.com/thunder-id/thunder-id) – Lightweight Go-based identity and access management engine securing human, agent, and machine access with decentralized identity and post-quantum-ready security.

* [Devise v5.0.4](https://github.com/heartcombo/devise) – Flexible Warden-based authentication for Rails.

* [Official Clerk JavaScript SDKs @clerk/backend@3.5.0](https://github.com/clerk/javascript) – SDKs for building user management and authentication experiences.

* [Heimdall v0.17.16](https://github.com/dadrus/heimdall) – Cloud-native identity-aware proxy and access-control decision service.

* [CouchAuth v0.28.0](https://github.com/perfood/couch-auth) – Full-featured Node.js/Express authentication for APIs and SPAs using CouchDB or Cloudant, with token-based and OAuth provider support.

* [Unkey v2.0.141](https://github.com/unkeyed/unkey) – API authentication and authorization platform for modern developer workflows.

* [Passkey login for Astro, SvelteKit and other frameworks v2.5.2](https://github.com/passlock-dev/passlock) – TypeScript library simplifying WebAuthn and passkey registration and authentication for frontend and backend frameworks.

* [Kinde NextJS v2.12.2](https://github.com/kinde-oss/kinde-auth-nextjs) – SDK for authentication in NextJS applications.

* [Ruby OAuth 1.0 / 1.0a v1.1.5](https://github.com/ruby-oauth/oauth) – RubyGem for implementing OAuth 1.0 and 1.0a clients and servers in Ruby applications.

* [auth v2.1.4](https://github.com/go-pkgz/auth) – OAuth2 and direct credential authentication with email and Telegram verification, JWT-in-cookie sessions, avatar support, and middleware.

* [Magic JavaScript SDK @magic-ext/oauth2@15...](https://github.com/magiclabs/magic-js) – JavaScript SDK for frictionless web3 onboarding with a focus on security and privacy.

* [opencode-claude-auth v1.5.4](https://github.com/griffinmartin/opencode-claude-auth) – Self-contained Anthropic auth provider for OpenCode using Claude Code credentials, no separate login or API key needed.

* [Descope SDK for Go v1.20.0](https://github.com/descope/go-sdk) – Go library providing access to user management and authentication APIs for backend services.

* [ReviseAuth v0.8.1](https://github.com/excid3/revise_auth) – Pure Ruby on Rails authentication system inspired by Devise.

* [Gin-OAuth2 v1.5.16](https://github.com/zalando/gin-oauth2) – Middleware for Gin Framework enabling OAuth2 authorization and flexible access control.

* [Descope JS web-component-3.65.0](https://github.com/descope/descope-js) – Collection of JavaScript client authentication SDKs, embeddable widgets, and helper libraries for integrating authentication flows and session management.

* [Juno v0.0.77](https://github.com/junobuild/juno) – Serverless platform for hosting static sites, running WASM-based functions, and managing storage, authentication, and datastores with local-first, self-hosted control.

* [Svelte Clerk v1.1.9](https://github.com/wobsoriano/svelte-clerk) – Easiest way to add authentication and user management to Svelte and SvelteKit applications.

* [Limen v0.1.1](https://github.com/thecodearcher/limen) – Modern plugin-first composable authentication library for Go with modular plugins, adapters, session and security primitives.

* [Stack Auth emulator-dev-2026051...](https://github.com/hexclave/stack-auth) – Managed user authentication platform with developer-friendly SDKs, RBAC, passkeys, OAuth, webhooks, and optional self-hosting.