Top 5 websites

Youtube
This is a site that provides thousands of videos. Anything, literally anything can be found as a video.

Atptennis
The official website of tennis.

Dictionary
Dictionary website that I have used for a couple of years now, has lots of different sources compacted into one website.

Wikipedia
Wikipedia is like a major encyclopedia. Anything can be found in text.

Google
Google ofcourse the best search engine out there with it's various web applications such as, gmail, orkut, etc.

Ordinary

pastebin
A pastebin for TCL code and such.