Qmol is a program for viewing molecular structures and animating molecular trajectories. Originally based on the molview demo program by Mark Kilgard (from his book, Programming OpenGL for the X Window System) and inspired by the Xmol program. Qmol is similar to programs like VMD , MolMol , weblab, Swiss-Pdb Viewer, MolScript, RasMol, gOpenMol and ICM, but opts for fast, high quality rendering of molecules with an easy to use user interface.