Printing barcodes can be done with a font and printed to any laser or inkjet printer.  You can also purchase Barcode software that will allow you to print barcodes, text and even graphics onto labels.  Keep in mind, however, the label material used for Laser/Inkjet printers is porous and the toner/ink fills the peaks and valleys that are natural to that material.  Toner can flake after exposure to air after a while and barcodes can become unreadable by a scanner.  Also, due to those same peaks/valleys, dust and dirt can accumulate on the label and make the barcode unreadable.  Thermal Transfer and Direct Thermal printers are the best.