From Robert Krawitz:
Gutenprint, formerly named Gimp-Print, is a suite of printer drivers that may be used with most common UNIX print spooling systems, including CUPS, lpr, LPRng, or others. These drivers provide high
quality printing for UNIX (including Macintosh OS X 10.2 and above) and Linux systems that in many cases equal or exceed proprietary vendor-supplied drivers in quality and functionality, and can be used
for demanding printing tasks requiring flexibility and high quality. This software package includes an enhanced Print plug-in for the GIMP that replaces the plug-in packaged with the GIMP, and Ghostscript and CUPS drivers, as well as Foomatic data supporting the Ghostscript driver.