Orion Label Maker - Orion Label Maker is the all-in-one solution for designing and printing labels right from your Mac.
gLabels - gLabels is a program for creating labels and business cards for the GNOME desktop environment.
labelgrid - labelgrid - Open source label software using HTML, CSS and Javascript.
LABEL MATRIX - Barcode label design software that’s as simple as you need it to be, with helpful options that ensure a straightforward label design process.
NiceLabel - NiceLabel is a label design and label management systems that help companies of all sizes to enhance the quality, efficiency and speed of their labelling while reducing cost.
QZ Tray - Print raw (ZPL, ESC/P, FGL), HTML, PDF as well as communicate with USB, HID, and serial devices...