Gimp-Print - Photo-real printing for a wide range of modern inkjet printers. - http://www.mw-software.com/software/gimp-print/gimp-print.html
DJCtrl - Allows you to align and clean print heads; change text fonts, sizes and pitch; select landscape or portrait text printing; and see the printer state. For HP DJ printers. - http://homepage.eircom.net/~djkoshea/misc/djctrl.html
LabPrint - Label printing program with extensive facilities to design labels to suit any available laser or ink-jet label sheets. Supplied with over 20 pre-defined label sheets from the Avery range. - http://www.cjemicros.co.uk/4d/Circle/LabPrint/index.html
Network Printer Drivers - For communicating with network printers. - http://www.arsvcs.demon.co.uk/rci/netprint/index.html