ExactSeek
ExactSeek requires that you submit your name, email address and accept their newsletter and other spammy emails in order to receive a free listing on their site. So, use an alternate email address to avoid seeing the spammy material in your email box, though the SEO newsletter is not bad. You also can login and edit/update your listings, which is cool. All these free listings are added within 24 hours, which helps when you are announcing a new website and need to get some traffic to it, as many other search engines take a month to six months before crawling and including your listing.
