Below is a list of websites like RedLaser / services like / similar to RedLaser :
Red Laser is an iPhone application that lets you scan barcodes with your iPhone in order to compare the in-store price with other online deals. However, with the latest version of the application, RedLaser 2.2, you can create your own custom barcode scanning apps. To do so, first download the updated application from the iTunes App Store, then visit www.redlaser.com/apps from the iPhone's web browser. Follow the instructions on the page to set up your own application - you'll need to fill in data like the URL of the site you want to compare prices with, the URL for the app icon, etc. When complete, tap the "build app" button. The completed app can then be added to your homescreen. Although this app is designed more for personal use and not resale, it's still worth checking out if you want to create your own barcode scanning application without needing to know how to code..