Trampoline bills itself as "the quickest route to the tools you need," and it fits the bill pretty well. Unlike other similar app launchers and file manipulators, Trampoline offers what I would call a 'circular Dock' that can be toggled via a key or tied to a mouse button. Users can add their favorite and most-used apps to this on-call Dock, and it appears underneath your mouse, wherever that may be.
As a unique alternative to other comparatively 'bloated' app launchers (though I say that with love as I cannot work without Quicksilver), Trampoline offers a simpler, more direct approach to keeping your beloved tools right at your fingertips.
A demo is available from Old Jewel Software, and a license costs $19.95.