Calypso Imaging: www.calypsoinc.com
GIMP: www.gimp.org
GIMP Color Manager: www.freecolormanagement.com/color/color_manager.html
GIMP-Print: gimp-print.sourceforge.net
Little CMS: www.littlecms.com
RW Hawkins: www.rwhawkins.com
SANE: www.sane-project.org
VueScan: www.hamrick.com
Wilhelm Imaging Research: www.wilhelm-research.com