Common UNIX (and Linux) Printing System
CUPS is based on the emerging RFC based standard 'Internet Printing Protocol' (IPP) and on the verge of becoming the default printing system for a number of Distributions (easyLinux 2.1, Mandrake 7.2, SuSE 7.1) 'ESP PrintPro' is a commercial extension to CUPS and provides over 2300 printer drivers.