Sometimes you can’t judge a book by its cover. And you can’t judge an SEO tool by its interface:
At SEOmoz we take pride in making SEO tools that shine with beauty, often with great success. To be fair, we haven’t always hit the mark. You can’t judge a book by its cover. Some of the best SEO tools ever invented exist on a geek’s homemade Google Docs spreadsheet pulling in raw API data.
Read more at 10 Ugly SEO Tools that Actually Rock.