FLTK
fltk-mt came as a by product of several projects using FLTK. Some widgets are taken from FLTK bazaar.
fltk-mt
fltk-mt is used by the Gled project.
Gled
docs, download: fltk-mt-0.1.0-src.tar.gz
fltk-mt-0.1.0-src.tar.gz