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GNUstep

Frameworks and tools for building portable GUI desktop and server applications

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GNUstep aims to be source code compatible with Cocoa, allowing code to be built and ported across platforms including macOS (Cocoa), Unix (Solaris), Unix-like systems (GNU/Linux, GNU/Hurd, NetBSD, OpenBSD, FreeBSD) and Windows, hiding architectural differences between them.

12 alternatives to GNUstep

Ranked by how well each tool replaces GNUstep: shared features, audience, price and popularity.

  1. GTK

    A free and open-source cross-platform widget toolkit for creating graphical user interface

    Covers 3 of 10 key features.

    Open source
    64 out of 100 match—

  2. Glade

    A User Interface Designer

    Covers 0 of 10 key features and has a free plan.

    Free planOpen source
    60 out of 100 matchFree

  3. wxWidgets

    A C++ library for creating cross-platform applications with a single code base.

    Covers 2 of 10 key features.

    Open source
    59 out of 100 match—

  4. Pencil Project

    An open-source GUI prototyping tool that's available for ALL platforms.

    Covers 2 of 10 key features and has a free plan.

    Free planOpen source
    58 out of 100 matchFree

  5. Stencyl

    Make iPhone, iPad, Android, and Flash games without code.

    Covers 1 of 10 key features and has a free plan.

    Free plan
    56 out of 100 matchContact sales

  6. LibreCAD

    Free Open Source 2D-CAD

    Covers 2 of 10 key features and has a free plan.

    Free planOpen source
    56 out of 100 matchContact sales

  7. FontForge

    A free and open-source outline font editor

    Covers 2 of 10 key features and has a free plan.

    Free planOpen source
    55 out of 100 matchFree

  8. JavaFX (OpenJFX)

    An open source client application platform for desktop, mobile, and embedded systems

    Covers 2 of 10 key features.

    Open source
    55 out of 100 match—

  9. Gmsh

    A three-dimensional finite element mesh generator with built-in pre- and post-processing

    Covers 2 of 10 key features and has a free plan.

    Free planOpen source
    55 out of 100 matchContact sales

  10. Slint

    Declarative GUI toolkit for Rust, C++, JavaScript and Python

    Covers 2 of 10 key features and has a free plan.

    Free planOpen source
    54 out of 100 matchContact sales

  11. Riverbank Computing

    Publisher of PyQt, SIP and related tools for building Python bindings

    Covers 1 of 10 key features and has a free plan.

    Free planOpen source
    54 out of 100 matchContact sales

  12. Corona (Corona SDK)

    A free, cross-platform 2D game engine for building apps and games with Lua scripting.

    Covers 2 of 10 key features and has a free plan.

    Free planOpen source
    54 out of 100 matchContact sales