MyBlogGuest is a unique community that is based on one simple principle: if you provide quality, you don’t need to pay to be heard. It unites bloggers who are interested in connecting to other bloggers, journalists and other content creators in any niche and publish their high-quality articles on their blogs.
TweetedRanks is a free tool that tracks Google positions and updates you regularly via Google Talk or Twitter Private message.
A set of SEO-tools. Determination of the positions of domains in the google-SERP. Definition of PR, Alexa Page Rank, Google Indexed pages etc.