The Hewlett-Packard Inkjet Driver Project (HPIJS) is a printer driver for CUPS and Ghostscript, based on the Hewlett-Packard Appliance Printing Development Kit (APDK) for deskjet printers.
The hpijs-combo package includes hpijs 1.2.2, cups-o-matic, ESP Ghostscript 7.05.5, and foomatic PPDs for over 212 HP inkjet printers – everything you need to print with HPIJS in Mac OS X Jaguar.
More info and download link here.