Personally, I'd go for Alfred ( http://www.alfredapp.com/ http://www.alfredapp.com/ ) over Quicksilver. While Quicksilver is supposed to be more powerful, it j

Personally, I'd go for Alfred ( http://www.alfredapp.com/ http://www.alfredapp.com/ ) over Quicksilver. While Quicksilver is supposed to be more powerful, it just never really clicked for me and didn't feel very smooth. Alfred felt like it fit it better and let me do what I wanted to do - especially with the powerpack installed. Mostly I just use it as an app launcher, file finder (start with ' and only searches files), and file browser (start with / and you're browsing the filesystem). Anything much beyond that was just overkill.