The following software is freeware. Feel free to use it as you please. If you have comments or suggestions, please leave them on the blog.

Free PPC Keyword Expansion Tool – Generates a large number of keyword variations from a small number of source terms. Great for squeezing every penny out of the long tail of your search campaigns.

Product Feed Comparison Tool – Takes two versions of a product feed and shows you which products have been added, changed or deleted. Useful for managing a paid search or affiliate campaign for retailers with a large number of products.