HotFrog.com is a free US business directory the offers a Dofollow company website link. This is an easy way to get a free backlink to your website, which helps with SEO. You just need to create a business profile and add your website link.
You can get more than one link by creating news articles under your business profile too. The more information you add to your profile the higher up in each category your business will show. You can read their optimization tips here.
Even though I consider this a lower quality directory, I do believe there is some link-building benefit to adding your website there. This is because whenever I add a businesses website, the newly created HotFrog business profile is usually indexed and ranking in Google search within a couple of hours to a couple of days.
However, If you don’t take the time to submit a thorough, well-optimized listing, then I don’t recommend submitting at all. You’ll just be wasting your time.