SEOrush is a one touch resource which provides you a FREE SEO report for your URL or a competitors URL. The report will return On Page SEO and Off Page SEO as well as social presence, indexed pages, validation, meta information, various ranks and standard domain information.

Website Grader is a free SEO tool that measures the marketing effectiveness of a website. It provides a score that incorporates things like website traffic, SEO, social popularity and other technical factors. (more…)

Launched in December 2008, dataopedia.com is a web service that provides the most comprehensive information about websites available on the Internet. (more…)

Get simple information on any website: owner, location, daily visitors, IP neighbors and other stuffs that your mom can understand.

See how fast your website loads, test the speed of your ISP/website connection, with the WebWait web benchmark.

Sitonomy is an free online service that allows you to find out what technologies are used in particular website or blog.

Quarkbase is a free tool to find complete information about a website.
It is a mashup of over 30 data sources and many algorithms gathering information from Internet on various topics like social popularity, traffic, associated people, etc.