QuarkBase is a site summary web tool that promises to tell you "everything about a website". When you first come to QuarkBase, you'll see a stark website with no advertisement, or fancy design. Think Google. QuarkBase is web based and free to use. According to their About Me page, QuarkBase is a non-commercial mashup site with over 30 tools and algorithms. These tools help you to analyze a website on many different levels. Here are most valuable tools QuarkBase provides:
Summary
You find out "everything about a website" at one glance, including a screen shot of the website, a short site summary, and famous subdomains.
Introduction
This gives you information about the domain owner, where and when the domain was purchased, and when it expires. It also tells you key employee contacts. An interesting part of Introduction is that you see similar sites to the one you're looking up. You also see the website's tags and primary language.
Social Popularity
Find out how the popularity of a website. Here, you found out how many times a website has been referred to in popular sites like Delicious, Digg, Yahoo! Answers, Technorati, and StumbleUpon. You can find out the most popular pages of all time, and the top feeds.
Traffic
Find out the Alexa Traffic rank for the last 6 months. You can also find in which countries the website is most popular by user and page views.
People
You find the key people who are working at the company.
Spotlight
This page gives you information on what blogs are talking about the website you're researching. It also gives you Twitter updates about the site.
Company
The invaluable tool lets you see all the information about a company, including address of the headquarters, when it was founded, and the amount of employees. It gives you information on funding, investments, and mergers. If available, you can also see current job openings.
Technical
Find out the framework, the web server and the hosting service.