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

  • 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
  • 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
    JSmooth creates standard Windows executable files (.exe) that smartly launch java applications. It makes java deployment much smoother and user-friendly, as it is able to find and run Java VMs by itself, or help the user get one if none are available.
    Downloads: 81 This Week
    Last Update:
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  • 2
    pngcrush and other tools for manipulating PNG (Portable Network Graphics) and MNG (Multiple-image Network Graphics) files.
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    Downloads: 299 This Week
    Last Update:
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  • 3
    mk-configure is a lightweight and easy for use build system, written in bmake (portable version of NetBSD make) and POSIX tools (shell, awk etc.).
    Leader badge
    Downloads: 79 This Week
    Last Update:
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  • 4
    BitBurner

    BitBurner

    BitBurner AVR Programmer, a full and complete AVRdude GUI for Windows.

    BitBurner AVR Programmer is a graphical front end for the command line program AVRdude. It is used to transfer programs and data to the Atmel AVR family of microcontrollers. BitBurner is an attempt at a single AVRdude GUI programming solution for AVR developers and experimenters by providing comprehensive device support over a broad range of programming hardware. BitBurner supports all devices, memory spaces and programming hardware protocols provided by the latest version of AVRdude, including support for XMEGA devices. BitBurner hosts a full-function hex editor capable of direct transfers to and from all memory spaces of all devices. BitBurner contains a complete fuse and lock calculator with an extensive database describing all AVRdude's supported devices and more. BitBurner has innovative automation functions intended to simplify and accelerate the build process. By monitoring project output files BitBurner can trigger programming actions without direct interaction.
    Leader badge
    Downloads: 27 This Week
    Last Update:
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  • 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
  • 5
    One-JAR(TM)
    One-JAR(TM) is a simple solution to a vexing problem in Java: how to distribute an application as a single jar-file, when it depends on multiple other jar-files. One-JAR uses a custom classloader to discover library jar files inside the main jar.
    Downloads: 16 This Week
    Last Update:
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  • 6
    VHD2ISO

    VHD2ISO

    VHD to ISO converter

    This tool convert a virtual haddisk to an bootable iso file.
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    Downloads: 82 This Week
    Last Update:
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  • 7
    This project contains software for 'personalizing' the NSLU2 network storage device, manufactured by Linksys. None of this material was written or contributed by Linksys. The NSLU2 is run by embedded Linux, and as such, is perfect for 'personalization
    Downloads: 27 This Week
    Last Update:
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  • 8
    Java IDE, project support, build, debugger, grep.
    Downloads: 18 This Week
    Last Update:
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  • 9
    PW32 is primarily C runtime library for Win32 aiming to POSIX compliance. Its main concerns are effeciency and support even for low-end Win9x systems. LGPL. Also, PW32 is collection of ported software, aiming to be GNU (etc.) distribution for Win32.
    Downloads: 5 This Week
    Last Update:
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  • Custom VMs From 1 to 96 vCPUs With 99.95% Uptime Icon
    Custom VMs From 1 to 96 vCPUs With 99.95% Uptime

    General-purpose, compute-optimized, or GPU/TPU-accelerated. Built to your exact specs.

    Live migration and automatic failover keep workloads online through maintenance. One free e2-micro VM every month.
    Try Free
  • 10
    CMakeFiles

    CMakeFiles

    A collection of CMake files, biased towards projects using Fortran

    A collection of CMake files, biased towards projects using Fortran.
    Downloads: 5 This Week
    Last Update:
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  • 11
    Parallel Port Eprom Programmer contains a GNU/Linux driver that controls the eprom programmer throught the parallel port and a tool which allows reading and writing eproms.
    Downloads: 5 This Week
    Last Update:
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  • 12
    Asphyre

    Asphyre

    Asphyre is a cross-platform framework for Delphi and FreePascal.

    Asphyre, also known as Platform eXtended Library, is a cross-platform framework for developing video games and scientific applications in Delphi, and FreePascal/Lazarus. The framework provides facilities for real-time rendering of graphics (using DirectX, OpenGL or Software Renderer), text output, mathematics (including vectors and matrices) and networking communication, among other features. It also supports singleboard devices such as Raspberry PI, Intel Galileo, BeagleBone Black and others with features like GPIO, SPI, I2C and so on, along with external displays, sensors and other peripheral devices.
    Downloads: 2 This Week
    Last Update:
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  • 13
    This utility converts Motorola S-record files (namely .S19 files) to binary files and vice-versa. It has several useful features that allow full manipulation of record addressing and output file size.
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    Downloads: 2 This Week
    Last Update:
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  • 14
    Nullsoft Easy Installer is a tool for quickly creating and updating installers using Nullsoft Scriptable Install System.
    Downloads: 3 This Week
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  • 15
    This project is for a PE Builder plug-in for the Ext2Fsd software. I decided to develope this solution in order to be able to scan ext2/ext3 partitions using KAV/KIS anti-virus Rescue Disk which is created with PE Builder.
    Downloads: 2 This Week
    Last Update:
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  • 16
    PyAppExec

    PyAppExec

    Launcher that prepares Python/deps and runs your app like OS-native

    PyAppExec is a cross‑platform open-source launcher and installer that makes Python apps feel native. It locates or installs the required Python runtime, provisions an isolated virtual environment, installs your project’s pip requirements, and handles any external tools requirements or dependencies (e.g., FFmpeg) with version checks and auto-download/extract on Windows/macOS/Linux. The Qt-based installer can scaffold pyappexec.ini, copy/rename the launcher, and (on macOS) bundle a self-contained .app with icons. The optional run-time GUI captures logs, while CLI mode stays lean for automation. Config is driven by a simple INI per OS, so app IDs, entry points, requirements, and paths are declarative. PyAppExec also manages user-level caches/state, log rotation, and GUI suppression preferences letting you ship Python apps without asking end users to touch Python, virtualenvs, or package managers.
    Downloads: 2 This Week
    Last Update:
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  • 17
    RPM Package Manager (RPM) is a powerful package management system capable of installing, uninstalling, verifying, querying, and updating software packages. This is a port of the RPM software, including rpmbuild and yum/APT-RPM, to Darwin and Mac OS X
    Downloads: 2 This Week
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  • 18
    gRpmBuilder is a POWERFUL yet easy-to-use graphical program that will create rpm files and srpm files with a simple interface.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 19
    jStart32 works as Win32-EXE wrapper to start JAVA Applications running on Windows 2000 or Windows XP. Both tools, the wrapper and the configuration tool are written in Delphi 7.
    Downloads: 2 This Week
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  • 20
    AntDepo is a flexible distributed automation harness that enables you to break complex management processes down into reusable generic commands. For more information, visit http://www.antdepo.org.
    Downloads: 1 This Week
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  • 21
    This project is targeted to consolidate Embedded Linux Tools Chain under Windows. Most of the cross complication tools are compiled using cygwin.
    Downloads: 1 This Week
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  • 22
    JxMake

    JxMake

    A Java-based cross-platform build system.

    JxMake is a Java-based, cross-platform build system primarily inspired by the syntax and features of GNU Make, Perforce Jam, and CMake. In addition, JxMake provides several capabilities not typically found in other console-based build systems, including a built-in lightweight GUI, serial console, serial plotter, multi-MCU in-system programmer, and more. Currently, JxMake's loadable libraries (build scripts) are primarily designed for non-OS MCU systems and experimental use. Full support for building desktop applications is planned for future development. Building JxMake requires Java SDK 8 or later (note that Java SDK 8 is a Long-Term Support version).
    Downloads: 1 This Week
    Last Update:
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  • 23

    mingw-portage

    Small Portage for mingw & mingw-w64.

    Mingw-portage contain program `minmerge' and collection of scripts to build some packages. Together they allow you to automatically build any supported software packages for 32-bit mingw or 64-bit mingw-w64 and indeed toolchain. Requirements: MSYS & corresponding toolchain.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 24
    Creates Installers using Ant by configuring an XML file (no java required): The installer collects user input, then run specific Ant targets from a build.xml file. Runs in a Swing GUI or on the command line.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 25
    AVR microcontroller burning utility
    Downloads: 0 This Week
    Last Update:
    See Project
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