Open Source Authentication Software

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Authentication Software

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Browse free open source Authentication software and projects for Mac and Linux below. Use the toggles on the left to filter open source Authentication software by OS, license, language, programming language, and project status.

  • Auth0 for AI Agents now in GA Icon
    Auth0 for AI Agents now in GA

    Ready to implement AI with confidence (without sacrificing security)?

    Connect your AI agents to apps and data more securely, give users control over the actions AI agents can perform and the data they can access, and enable human confirmation for critical agent actions.
    Start building today
  • Context for your AI agents Icon
    Context for your AI agents

    Crawl websites, sync to vector databases, and power RAG applications. Pre-built integrations for LLM pipelines and AI assistants.

    Build data pipelines that feed your AI models and agents without managing infrastructure. Crawl any website, transform content, and push directly to your preferred vector store. Use 10,000+ tools for RAG applications, AI assistants, and real-time knowledge bases. Monitor site changes, trigger workflows on new data, and keep your AIs fed with fresh, structured information. Cloud-native, API-first, and free to start until you need to scale.
    Try for free
  • 1

    DACS - Distributed Access Control System

    Authentication, Access Control, and Single Sign-On

    DACS,a light-weight single sign-on and role-based security system for Apache or server-based software, provides comprehensive authentication capabilities, and powerful, transparent rule-based authorization checking for any web service or CGI program. The latest release is DACS 1.5.1 (26-Oct-2025) It is not available here! Get it at https://dacs.dss.ca/download.html
    Downloads: 1 This Week
    Last Update:
    See Project
  • 2
    OpenID is a decentralized authentication protocol for web applications. OpenID users need share credentials with only one OpenID provider, and not every forum and network they log on to. This leads to a safer and more convenient Web. http://openid.net/
    Downloads: 1 This Week
    Last Update:
    See Project
  • 3
    A C# module to allow ASP.Net sites to easily use the TypeKey authentication service.
    Downloads: 0 This Week
    Last Update:
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  • 4
    CAILogin (Counter AI Login) is an image-based user verification program for web-page logins. It's written in plain C with no special dependencies, and hence it's very suitable for embedded systems which lack "big" interpreted languages, such as PHP.
    Downloads: 0 This Week
    Last Update:
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  • Run applications fast and securely in a fully managed environment Icon
    Run applications fast and securely in a fully managed environment

    Cloud Run is a fully-managed compute platform that lets you run your code in a container directly on top of scalable infrastructure.

    Run frontend and backend services, batch jobs, deploy websites and applications, and queue processing workloads without the need to manage infrastructure.
    Try for free
  • 5
    CGIgen is a collection of classes that are useful in data-encapsulation esp. for CGI-scripts. It also includes other classes that may be helpful in writing CGI-scripts.
    Downloads: 0 This Week
    Last Update:
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  • 6
    A Perl CGI JavaScript framework for implementing a MD5 based encryption Secure login on both client and server machines. The password is never stored or transmitted as plain text. Also encrypts cookies to maintain sessions.
    1 Review
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    An ISP-class utility to allow FTP account holders to change their password independently using a web browser. Written in Python and Works with PureFTPd-MySQL servers where the PureFTPd FTP server uses a MySQL database for user authentication.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    XSDB XML is to DATA as HTML is to DOCUMENT. Publish and combine data as easily as HTML format and web browsers publish and view documents. Implementations in Python, javascript, java, C#/.NET.
    Downloads: 0 This Week
    Last Update:
    See Project
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