1. 
Generates barcodes
using the GNU barcode library.
File contains a barcode helper program (nice front-end for actual
barcode graphics makers) and a php application for barcodes
(using that helper program).
There is an online demo.
2. 
This code has been written by Joel Yliluoma, a.k.a.
Bisqwit,
and is distributed under the following terms:
* No warranty. You are free to modify this source and to * distribute the modified sources, as long as you keep the * existing copyright messages intact and as long as you * remember to add your own copyright markings. * You are not allowed to distribute the program or modified versions * of the program without including the source code (or a reference to * the publicly available source) and this notice with it.
3. 
Barcode generator v1.3.4.2 - copyright (C) 1992,2004 Bisqwit (http://iki.fi/bisqwit/)
New versions and support at http://iki.fi/bisqwit/source/barcodetest.html
Usage:
barcodehelper <stringtoencode> [encodingindex]
Encoding indexes are defined in /usr/include/barcode.h,
and should be as follows:
0=any, 1=ean, 2=upc, 3=isbn, 4=code39,
5=code128, 6=code128c, 7=code128b, 8=i25,
9=raw code128, 10=codabar, 11=msi,
12=plessey, 13=code93.
(At least when this program was written.)
Output is text, and contains following lines:
A <input>
P <the barcode>
T <text info>
E <encoding name>
X <width>
M <margin>
The barcode is a coded string that should be interpreted as follows:
digit = width of bar/space (space is first)
alphabet = width of bar (a=1,b=2,...) and also tells
that there's no character below/above
- = characters will be below
+ = characters will be above
Text info is a coded string that contains groups of x:y:c
where x is x-coordinate, y is y-coordinate and c is the
character to be printed. Possibly prefixed with +/- as
previously explained.
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