(4/7) #FLTK has a lot of the features of standard #GUI libraries but still manages to be lightweight with few dependencies. It's been used with #nano-x to create #XFDOS and #nanolinux. #TinyCore also features FLTK applications. FLTK applications even work on handheld and mobile devices. Here's a list of FLTK programs: https://www.fltk.org/links.php?LC+P22+Q While some are designed for older versions of FLTK, I've had no trouble updating many of them to later versions of the library.
Links: By Category - Links - Fast Light Toolkit (FLTK)