Pretty much any time someone watches me over my shoulder use a Mac I control, they see me do something with Quicksilver and they ask me what that was and how did I get to wherever I got so fast. If you use a Mac–and of course you should, even Paul Graham thinks so, and for good reasons–you really should download Quicksilver and check it out. What is it? Well, the problem here is that it’s difficult to explain. It’s a launcher and a search tool and it’s a whole bunch of other things, all wrapped into one. I know that doesn’t sound very exciting, but once you use it you’ll be amazed that you ever lived without it. Really. Honest. Just get it and check it out. Be sure to download many of the plug-ins, because they enable many of the things which make it so cool, like integration with the Address Book.