Url shorteners
They allow you to convert long url's to short ones.Additionally bit.ly and tiny.cc allows u to have have custom names in the url like http://bit.ly/balki will point to this blog. Be first to grab urs. :)
Mailinator
This allows u to have a mail address without signup or password. The main use of this mail address is to use it as an temporary address required for signups for few unimportant sites. You can view all the mails at the mailinator.com site. Another good thing is that a duplicate mail address for everymail address is created which cant be used to read mails (write only address) but only to send. So this makes u own the address to some extent if u have some funny name for ur address that no one will be guessing or be willing to have.
Warning: There was a similar service called emailmenot of bugmenot.com which stopped working now. So i cannot reset my password for some sites which use bugmenot email as key.
At last, fun
Omegle
Omegle is a brand-new service for meeting new friends. When you use Omegle, we pick another user at random and let you have a one-on-one chat with each other. Chats are completely anonymous, although there is nothing to stop you from revealing personal details if you would like.
If you like Omegle, be sure to check out the Omegle blog!