OctoPrint is the snappy web interface for your 3D printer
OpenPrinting CUPS Sources
Hewlett-Packard's Linux imaging and printing software
Powerful desktop publishing software
Insert and manage Linux computers in AD
Easy-to-use print report library and designer
Modular XSL-FO Implementation for Java.
Printer supply, alert and counter monitoring
Bar Code (1D or 2D) generator in pure Ada
Java Web Printer
Imagic Solution Easy to Use Windows Based Weighbridge Software
Simple Reporting System
Running JasperReports from command line
Non-spooling printer daemon
Apple CUPS Sources
Casio KL-G2 Printing for Linux
graphical Frontend to CUPS