Quicksilver

Quicksilver is a tool made for Mac that improves the computer's productivity while it is being used. By just writing the name of a program or document, Quicksilver shows a relation between the elements and actions linked to each text string. You don't have to type the full name, you just have to write the first few letter or an abbreviation.

It relies on a system plugin that extends its functionality to other apps, like Mail, iTunes, Safari or Firefox. Quicksilver studies the user's actions and then the actions that are done with most frequency are the first to show up.

Quicksilver simplifies the execution of frequent jobs, like copying, compressing a file, sending an email or searching for text on a determined website. In addition, it allows you to define your own shortcuts for each action.