To help you make design and development decisions. Knowing what websites work and which ones tank can give you insights and inspiration on what design elements, website features, and website content is effective. 1. Yahoo! Site Explorer__2. Compete__3. Quantcast__ 1. Yahoo! Site Explorer 2. Compete__4. Alexa__5. Feed Compare__6. popuri.us__7. socialmeter__ 8. TweetVolume__9. Quarkbase__10. BlogPulse Profiles__11. Technorati Blogging Central 12. Statbrain.com__13. Cubestat____14. dnScoop__15. WebsiteOutlook To help you in your analysis, here are 15 top-notch, free, and simple web tools to help you learn more about a particular website.