Analyze conversations by Twitter ID and find relevant and influential voices about a topic based on replies between Twitterers on Twitter-Friends. Related posts: Twitter Karma Search The Web By ‘Conversations’ Visual Twitter Network Browser

Based on Google search results of course, this Google tool shows you relevant keyword ideas and their Adwords competition for your website.   Related posts: Get New Keyword Ideas Stats On PPC Ads Monthly Keyword Search Volume

A basic tool to see how difficult it will be to rank high for a given keyword or keyword phrase in the SERPs. SEOchat doesn’t give specific info about how they arrive at the result (anything else besides number of searches and SERPs?), but a few test searches turned out

Use this free site to ask questions, or help someone else with theirs. StackOverflow has a simple interface and is useful when you search for specific answers and interesting to browse.   Related posts: Q & A About Hardware, Software, Servers, Programming, Webdesign Post And Keyword Ideas Through Questions Identify

If you need to know how long it takes to get to the Neptune at the speed of light, visit WolframAlpha to get your answer. WolframAlpha doesn’t search web pages for answers, but computes the results to your customized questions based on human knowledge recorded in scientific resources, encyclopedias, government

This tool at SEOworkerss gives you an overview of basic aspects of your page, like meta tags; keyword density; page load time; title meta tag relevancy to page content; robots.txt file and more.   Related posts: Free SEO Analysis Tool Meta Tag & Keyword Analyzer How Hard Is It To

Traditional search engines search documents and pages, Topsy searches current conversations on social media sites like Twitter, blogs, Flickr, Digg, Yelp, Identica and many other communities for your search term. It displays search results based on influence of the source.   Related posts: Search Engine Spider Simulator Social Media Search