 Previous 1.x versions were based on a modified version of FLTK called eFLTK, while later versions are based on pure FLTK 1.x.Equinox (later renamed to the "Equinox Desktop Environment") is an open-source, X Window System desktop project that started in 2000 by Martin Pekar, with help of others, most notably Mikko Lähteenmäki who wrote the (original) EDELIB, Dejan Lekic, and Szasz Pal.The original EDE GNU Savannah project is still available for visitors who want to look at the early source code.