RasTop is a molecular visualization software adapted from the program RasMol, which was initially developed by Roger Sayle. RasTop is particularly adapted for educational purposes and for the rapid analysis of macromolecules at the bench. RasTop wraps a user-friendly graphical interface around the "RasMol molecular engine". There is no need to type on the command line; each command in the menu generates its own script. Through an extended menu and a command panel, users can manipulate numerous molecules rapidly and learn about them. Work sessions are saved in script format and are fully regenerated with a simple mouse click.
RasTop is available on Windows and Linux platforms. Linux users should install Wine prior to RasTop. Mac users can use Virtual PC, but it is not free software. RasTop is an open-source under the GPL license and is free to use. Check at openrasmol.org librar2 for more info and others branches of rasmol.