You might want to try Nuklear https://github.com/vurtun/nuklear or imgui https://github.com/ocornut/imgui , both to my knowledge have a Vulkan backend. Source: almost 2 years ago

In fact, if using a modern graphics pipeline with shaders, you will actually have to learn how to draw a single rectangle to your screen, and then use that knowledge to draw (anti-aliased) lines, rectangles, arcs, circles, ellipses, etc. too. For instance, have a look at https://www.cairographics.org/ https://github.com/vurtun/nuklear https://github.com/memononen/nanovg and https://github.com/nical/lyon. There are... Source: over 2 years ago

Another option that's pure c and a great library is nuklear https://github.com/vurtun/nuklear. Source: over 2 years ago

If you need the GUI system, then you will be binding against Java and it will be very time consuming. You might be better off looking at some of the young wxWidgets / Qt Android ports. Or simply using a light OpenGL based UI library like Nuklear (or newer). Source: almost 3 years ago

P.S.: I know Nuklear has got a node editor, but this editor is only in an early stage of development and Nuklear development has pretty much halted since Vurtun left. Source: about 3 years ago

Marketing automation and design tools like Mediamodifier https://mediamodifier.com/. Source: about 2 years ago