The Mac Barcode Company has introduced Barcode Express 1.0 (http://www.mac-barcode.com/express/), a software package for creating barcodes for Mac OS X. It costs US$99; a demo is available for download.
With Barcode Express, type in your barcode number, set a few options, click save, and — voila — instant barcode. The software supports all industry standards, and makes vector EPS files that import into Adobe Illustrator, InDesign, and Photoshop. PNG, TIFF, and JPEG are supported, too.
Barcode Express makes UPC, EAN, ISBN, and other barcode types for use on product packages, books, labels, and more. With Instant Preview, it lets you see your barcode as you type it and change the settings, so you always know what you’re going to get.