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

  • Gemini 3 and 200+ AI Models on One Platform Icon
    Gemini 3 and 200+ AI Models on One Platform

    Access Google's best plus Claude, Llama, and Gemma. Fine-tune and deploy from one console.

    Build generative AI apps with Vertex AI. Switch between models without switching platforms.
    Start Free
  • Catch Bugs Before Your Customers Do Icon
    Catch Bugs Before Your Customers Do

    Real-time error alerts, performance insights, and anomaly detection across your full stack. Free 30-day trial.

    Move from alert to fix before users notice. AppSignal monitors errors, performance bottlenecks, host health, and uptime—all from one dashboard. Instant notifications on deployments, anomaly triggers for memory spikes or error surges, and seamless log management. Works out of the box with Rails, Django, Express, Phoenix, Next.js, and dozens more. Starts at $23/month with no hidden fees.
    Try AppSignal Free
  • 1
    Gantry Framework

    Gantry Framework

    Next Generation Template / Theme Framework

    Develop CMS themes quickly and efficiently while providing flexibility and ease of use for end-users. Gantry was born when the RocketTheme development team wanted to consolidate our extensive set of custom Grav, Joomla and WordPress theme functionality into a simple, easy-to-use framework. Yes, that’s right! Gantry 5 has a powerful and easy-to-use Layout Manager that ensures controlling the layout is a highly visual experience. When we started the Gantry 5 project, we wanted to think past the concept of Gantry as a framework. We wanted to create something so versatile and powerful, that it could stand on its own as a platform, virtually independent of a CMS in concept and implementation. Utilizing a dual MIT & GPL license, Gantry is free to use pretty much anywhere! Designed from the ground-up with performance and efficiency in mind. Configure and structure your menu hierarchy with our new Menu editor.
    Downloads: 6 This Week
    Last Update:
    See Project
  • 2
    Beerus

    Beerus

    Beerus is a web framework developed entirely in go,

    Beerus is a web framework developed entirely in go, Based on net/http, it extends the management of routes, adds interceptors, session management, receiving parameters with struct, parameter validation, etc. It also provides WebSocket support to upgrade the http protocol to WebSocket and implement communication.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 3
    Feeling Responsive

    Feeling Responsive

    »Feeling Responsive« is a free flexible theme for Jekyll

    Feeling Responsive is a free flexible theme for Jekyll built on the Foundation framework. You can use it for your company site, as a portfolio or as a blog.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 4

    TinyWPDK

    TinyWPDK is a tiny development kit for wordpress theme.

    TinyWPDK is a tiny development kit for wordpress theme. It has features like MVC application framework. It is not complex but is very simple for users to understand. All you have to develop themes of wordpress is to download the kit and include the entry file.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Go from Code to Production URL in Seconds Icon
    Go from Code to Production URL in Seconds

    Cloud Run deploys apps in any language instantly. Scales to zero. Pay only when code runs.

    Skip the Kubernetes configs. Cloud Run handles HTTPS, scaling, and infrastructure automatically. Two million requests free per month.
    Try it free
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