OctoPrint is the snappy web interface for your 3D printer
Zasilkovna.cz PHP library supporting SOAP and REST API + custom Label
Java Web Printer
Modern framework to print the web correctly
Camera2Label supports generating, saving and printing labels
QASreport - is a multi-platform C ++ Qt library for building reports
Defines a complete reports/documents system for WAMP applications
Qt based report solution
Barcode Generator Printer Reader (Scanner device)
This emulator designed to simulate a network print server
V5Cart is a full featured free open source shopping cart
Printing on Linux with Windows drivers
"on-the-go" printing made easy