1.qt / qtbaseQt Base (Core, Gui, Widgets, Network, ...)qtc-plus-plusqt5C++No license3.1K total1.2K forks+72 starsfrom 3,036 · score 4.29
2.cycfi / elementsElements C++ GUI librarycppcpp17cpp17-libraryguimodern-cppc-plus-plusC++No license3.7K total284 forks+41 starsfrom 3,694 · score 3.74
3.wxWidgets / PhoenixwxPython's Project Phoenix. A new implementation of wxPython, better, stronger, faster than he was before.pythoncross-platformgui-frameworkgui-toolkitguiwindows+5 morePythonNo license2.6K total563 forks+24 starsfrom 2,609 · score 3.22
4.vurtun / nuklearArchivedA single-header ANSI C gui librarycguinuklearsingle-header-libc89imguiCNo license14K total1.1K forks+6 starsfrom 13,963 · score 1.95
5.libRocket / libRocketlibRocket - The HTML/CSS User Interface libraryC++No license1.2K total300 forks+5 starsfrom 1,177 · score 1.79
6.clj-commons / seesawSeesaw turns the Horror of Swing into a friendly, well-documented, Clojure libraryClojureNo license1.5K total144 forks+1 starsfrom 1,483 · score 0.69