This nice software, developed by WB8RCR let you design and print your own QSL cards, allowing to personalize background, by importing pictures or just filling with a plain color, and let you personalize headings and address as well as your own callsign.
It can import ADIF log file for fields auto-filling during the print process, or allow you to insert directly QSO Data into a table.
It runs on Windows, I’ve tested it on Windows XP, and is completely Free !