Tell A Friend is a brand new JavaScript based widget for blogs and websites that will enable site visitors to send a link of the current web page to their friend(s) via email or through IM like Google Talk, Yahoo! Messenger, etc.

Now you may ask how is this stuff any different from say, ShareThis or AddThis. True, there is some overlap but Tell a Friend service is more about email which is still the most popular way of sharing content.

For instance, your visitors can pull a list of their friends who are currently online on Gtalk or AOL and directly send them a link of the current page. Alternatively, they may select one or more contacts from their address books inside Gmail, Yahoo! or Live Hotmail and send them a message with a link to the current page.

Another reason why some publishes may like “Tell a Friend” more is because it enables their visitors to customize the message before shooting it to their friends.

Also see: Most Useful Blog Add-ons