SpaceTime is a popular OpenGL 3D graphics Simple Network Time Protocol (SNTP) client widely available since 1998, now available with complete source code.Originally crafted as a programming exercise to learn a variety of OpenGL 3D graphics skills, SpaceTime has evolved to enjoy a measure of success among those who wish to keep their PC system clocks in nearly perfect step with the rhythms of the universe. Provides support of 3D Studio MAX (.3DS) mesh files, a realistic warp-drive/starfield effect, and (for registered users) complete source code suitable for learning OpenGL programming techniques. Unregistered version expires every Sunday at 00:00 (GMT).