We've created several tools that assist in creating PDFs, covers, barcodes, etc.
Eventually, we'll place them all here for you to use, for free.
CreateSpace Cover Template Generator
Create an SVG file and a PNG file
This tool creates an SVG file for Inkscape or other vector programs, such as Illustrator, and a PNG file for Photoshop.
The files conform to the CreateSpace cover requirements.
Just choose your trim size, number of pages, and paper type.
ISBN-13 Bookland Barcode Generator
Create a high-res PNG file
This tool creates a barcode image as a high-res .PNG file ready for printing. The barcode can optionally include the price supplement.