I noticed many webmasters paying for overpriced software just to gain the ability to spy on competitor’s backlinks and thereby beef up their own.

Why pay when you can do it free?

Domain-pop.com is the most thorough FREE service ive seen that spies on all backlinks, incoming pagerank and IP. Many commercial software don’t do that.

If you haven’t yet, check out the site. And rank high. And get rich.

PS- it trumps iwebtool.com hands down