HEATKEYS

StatsCrop - a web service that lets you explore any website informations and its history, understand your competitor

USA.gov Apps Gallery, featuring apps and mobile sites developed by government agencies on a variety of platforms, including iPhone, Android and Blackberry. The government apps and mobile sites allow you to access official information on various topic...

Alexa provides information about websites including Top Sites, Internet Traffic Stats and Metrics, Related Links, Online Reviews Contact Information and Search Analytics for SEM and SEO optimization. The Alexa Toolbar is a browser add-on that shows d...

Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with friends, upload an unlimited number of photos, post links and videos, and learn more about the people ...

YouTube is a place to discover, watch, upload and share videos.

ThatWeb is a unique, user-friendly website review tool. Run a free review of your website and compare it to competitors.

W3Techs provides information about the usage of various types of technologies on the web.

Summary of free online courses from Stanford

From AboutUs: See what information we have on Wiki and share your knowledge.

PageGlimpse is a service providing web page screenshots for your application.