Alternatives to Agar for all platforms with any license

  • GTK+

    GTK+ is a multi-platform toolkit for creating graphical user interfaces. Offering a complete set of widgets, GTK+ is suitable for projects ranging from small one-off...

    Free Open Source Mac Windows Linux

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  • PySide

    The PySide project provides LGPL-licensed Python bindings for the Qt cross-platform application and UI framework. PySide Qt bindings allow both free open source and...

    Free Open Source Mac Windows Linux

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  • JavaFX

    OpenJFX is an open source, next generation client application platform for desktop, mobile and embedded systems built on Java. It is a collaborative effort by many...

    Free Open Source Mac Windows Linux

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  • PyQt

    PyQt brings together the Qt C++ cross-platform application framework and the cross-platform interpreted language Python.

    Free Open Source Mac Windows Linux

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  • TK

    Tk is a free and open-source, cross-platform widget toolkit that provides a library of basic elements of GUI widgets for building a graphical user interface (GUI) in...

    Free Open Source Mac Windows Linux BSD

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  • wxPython

    wxPython is a GUI toolkit for the Python programming language. It allows Python programmers to create programs with a robust, highly functional graphical user interface...

    Free Open Source Mac Windows Linux

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  • Avalonia

    Avalonia is a WPF-inspired cross-platform XAML-based UI framework providing a flexible styling system and supporting a wide range of OSs: Windows (.NET Framework, .NET...

    Free Open Source Mac Windows Linux Microsoft Visual Studio

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  • Nana C++ Library

    Nana C++ Library takes aim at easy-to-use and portable library, it provides a GUI framework and threads for easy programming with modern C++ methods, such as traits...

    Free Open Source Windows Linux

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  • FLTK

    The Fast, Light Toolkit (FLTK, pronounced fulltick) is a cross-platform graphical user interface (GUI) library developed by Bill Spitzak and others. Made to accommodate...

    Free Open Source Mac Windows Linux

    FLTK icon
  • Fox toolkit

    The FOX toolkit is an open source, cross-platform widget toolkit, that is, a library of basic elements for building a graphical user interface (GUI). It features a...

    Free Open Source Mac Windows Linux

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  • Standard Widget Toolkit

    SWT is an open source widget toolkit for Java designed to provide efficient, portable access to the user-interface facilities of the operating systems on which it is...

    Free Open Source Mac Windows Linux BSD

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  • IUP Portable User Interface

    IUP is a multi-platform toolkit for building graphical user interfaces. It offers a simple API in three basic languages: C, Lua and LED. IUP's purpose is to allow a...

    Free Open Source Mac Windows Linux

    IUP Portable User Interface icon

Platforms

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