A bookmarklet is a software application that is stored as a bookmark in your web browser. The bookmarklet usually contains JavaScript commands that allows the user to extend the browser's functionality.

Bookmarklet is software application that is stored in a web browser as a bookmark. The small application allows you to interact in some way with the web page that you have loaded.

http://www.heartrate.se/download_mafia

You could use the del.icio.us bookmarklet in the boockmarks bar.

Yes, you can sign up with Pinterest without a toolbar!

Without a toolbar, you won't be able to add the pin bookmarklet, which is the tool you would use to pin images from the web. However, you can still repin other users' images, as you don't need the pin bookmarklet to repin.