Qt is a cross-platform application framework that is widely used for developing application software with a graphical user interface.
Free for open-source projects, paid plans available for commercial use
Best FLTK Alternatives ranked by AI · updated May 2025
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FLTK (Fast Light Toolkit) is a cross-platform C++ GUI toolkit for developing graphical user interfaces. It is known for its small footprint and efficiency.
Price: Free
🎯 fltk.org
Top 6 FLTK alternatives
GTK is a free and open-source widget toolkit for creating graphical user interfaces.
wxWidgets is a C++ library that lets developers create applications for Windows, macOS, Linux, and other platforms with a single code base.
Free and open-source
Ultimate++ is a C++ cross-platform rapid application development framework. It includes a set of libraries, GUI toolkit, and an integrated development environment.
JUCE is a C++ framework for developing cross-platform software applications, particularly in the audio, graphics, and multimedia domains.
Various licensing options available
Electron is a framework for creating native applications with web technologies like JavaScript, HTML, and CSS.
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