This is a port of the popular Rasmol v.2.5 for Xfree86 on OS/2.
It is fully functional to my knowledge except for the following flaws:
1: You cannot type commands directly into the command line Xterm; the focus has to be on the graphic window. Then, anything that you type will appear on the command line.
2: The help menu doesn't work. To access help, have focus on the graphics window and type : help "subject".
This port is made possible by Dr. Roger Sayle, whom I believe is the author of the source code, and Dr. Holger Veit, chief architect of XfreeOS/2.