I personally swear by quicksilver. Tried briefly other launchers, but I’ve never stuck with them. Quicksilver is just so damn fast and cool..I seriously couldn’t live without it. Makes everything much, much faster.
Quicksilver is the absolute best launcher for those who like using the keyboard. You can create hotkeys to launch applications or files, look up words in the dictionary, send instant messages, and much much more. This app/concept should be implemented in every platform!
Very good product, I’ve been using it for years (old version actually) hence on this site looking for a newer version.