Chimera is a multi-faceted, interactive molecular graphics program, which can be downloaded from the Web site of the Computer Graphics Laboratory (CGL) at the University of California--San Francisco. Any interested user is welcome to use this molecular modeling software at no charge for academic, government, non-profit, or personal use. An astonishingly wide array of applications are possible with Chimera -- too numerous to list here. Fortunately, the site contains an extensive user's guide that even includes helpful tutorials. Users will also find a gallery of images created with Chimera -- a cool feature even for visitors not remotely interested in molecular modeling.