FOX is an Extensible C++ Class Library for Multi-Platform GUI development.
Platforms supported include Linux, Windows NT/9x/2K, and UNIX/X11 workstations
(IRIX, Solaris, HP-UX, Tru64, AIX, FreeBSD, and others).
System Requirements
Operating System: All 32-bit MS Windows (95/98/NT/2000/XP/Vista/7), POSIX (Linux,BSD,Solaris etc..), IRIX, Linux, Windows 95/98/ME