Can you believe there are people who would charge you for a barcode font like this? It took very little time to make this so I thought I'd donate it to the world. It is suitable for scanning even at fairly small point sizes (with a laser printer). I have tested printed copies of this font with a couple different scanners and it worked perfectly.
This is 3 of 9 (sometimes called "code 39"), a widely used barcode standard that includes capital letters, numbers, and several symbols. This is not the barcode for UPC's (universal price codes) found on products at the store. However, most kinds of barcode scanners will recognize 3 of 9 just fine.
Now included with Free 3 of 9 is a new version of the font called Free 3 of 9 Extended. This version covers the extended 3 of 9 standard that includes all the ASCII characters.