Here are a sample of interesting use of the famous barcode, mainly found in Oddee.
A Zebra Barcode photo by Tim Flach
D-Barcode is a Japanese Design Agency that creates specific barcodes (that works !) for retail products. A great packaging idea and as their slogans says "Big ideas are small"
A CD holder designed by Marián Laššák
Barcode Street Art in Northampton
Barcode Building Vitruvius & Sons Architectural Studios in St Petersburg