OctoPrint is the snappy web interface for your 3D printer
Booklet, Signature generator, Imposition
A utility that adds manual duplex to the "Print" menu
Pyside QtRPT
Python package for raster language protocol of the Brother QL series
Music score editor
Interface gráfica para PyKota / Graphical interface for PyKota
KBarcode is a barcode and label printing application for KDE 4.
A tool that makes printing multi sided documents an easy task.