OctoPrint is the snappy web interface for your 3D printer
Optimized firmware for RepRap 3D printers based on Arduino platform
Client/server side PDF printing in pure JavaScript
Zasilkovna.cz PHP library supporting SOAP and REST API + custom Label
OpenPrinting CUPS Sources
Haskell pretty printer
Powerful desktop publishing software
Hewlett-Packard's Linux imaging and printing software
Free Java Reporting Library
A Label Printer Application
Easy lead sheets from text input
Reporting tool, libraries and designer
Easy-to-use print report library and designer
Insert and manage Linux computers in AD
Bar Code (1D or 2D) generator in pure Ada
neoHort:Java PDF&XLSX runtime builder-based iText&JExcelAPI&Apache POI
Gestione dei Registri Parrocchiali, Management of Parish registers
Epcol gives access to factory builtin features of ESC-P2 printers
Online service for PDF conversion (to PDF)