Browse free open source Build Tools and projects for Windows and BeOS below. Use the toggles on the left to filter open source Build Tools 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.
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  • Try Google Cloud Risk-Free With $300 in Credit Icon
    Try Google Cloud Risk-Free With $300 in Credit

    No hidden charges. No surprise bills. Cancel anytime.

    Use your credit across every product. Compute, storage, AI, analytics. When it runs out, 20+ products stay free. You only pay when you choose to.
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  • 1
    CLISP - an ANSI Common Lisp
    CLISP is a portable ANSI Common Lisp implementation and development environment by Bruno Haible. Interpreter, compiler, debugger, CLOS, MOP, FFI, Unicode, sockets, CLX. UI in English, German, French, Spanish, Dutch, Russian, and Danish.
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    Downloads: 247 This Week
    Last Update:
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  • 2
    Fastjar is an implementation of Sun's jar utility that comes with the JDK, written entirely in C, and runs in a fraction of the time while being 100% feature compatible.
    Downloads: 5 This Week
    Last Update:
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  • 3
    Coffeetronix is the fast and simple Java UML workbench. It parses your java sources and creates an instant UML classdiagram.
    Downloads: 0 This Week
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  • 4
    GSL is aimed at providing a tool for rapid graphical programming. GSL is an object-oriented script language with graphical support. Its goal is to provide an easy way to specify worlds and at the same time enable the coding of behaviours of those worlds.
    Downloads: 0 This Week
    Last Update:
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  • MongoDB Atlas runs apps anywhere Icon
    MongoDB Atlas runs apps anywhere

    Deploy in 115+ regions with the modern database for every enterprise.

    MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
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  • 5
    JResEditor eases the editing of java resource files. It provides validation and allows easy comparison of multiple resource files. The GUI allows easy navigation to any key and provides wizards to create keys and new resource files.
    Downloads: 0 This Week
    Last Update:
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  • 6
    RSD is a PHP development environment. The most powerful part is the RSDEngine - provide it with a SQL database schema and additional options and it will generate a ready-to-run application. Other goodies: versioning, generation of API docs, unit tests.
    Downloads: 0 This Week
    Last Update:
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  • 7
    A system for developing custom XML editors with ease. XML editors are built from Java editing components.
    Downloads: 0 This Week
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  • 8
    wspacegen is an interactive IDE for programing with whitespace (http://compsoc.dur.ac.uk/whitespace/). So it's possible to create .ws code relative easily and debug it as well. But attention, you'll addicted to it (-:
    Downloads: 0 This Week
    Last Update:
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  • 9
    antlraux is a java package thought to be used in combination with antlr(http://www.antlr.org). Features contextual information management, command line parsing and lexical information treatment.
    Downloads: 0 This Week
    Last Update:
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  • Application Monitoring That Won't Slow Your App Down Icon
    Application Monitoring That Won't Slow Your App Down

    AppSignal's Rust-based agent is lightweight and stable. Already running in thousands of production apps.

    Full APM with errors, performance, logs, and uptime monitoring. 99.999% uptime SLA on the platform itself.
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  • 10
    orange is a new object oriented programing language, combining features from objective c, java and scheme. it's main targets are compactness, efficency and rapid prototyping.
    Downloads: 0 This Week
    Last Update:
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