To quote the lovely helpfile which comes with it:

"What Is Flarp!Bar Anyway?

Flarp!Bar is a powerful and highly configurable utility to offer keyboard-centric launching of web browsers, programs and documents on your PC - via a unique scripting system which makes visiting "http://www.blah.com" as easy as com blah, and a Google search for "some search words" as easy as ggl some search words."

The internal default skin looks like this:

(except it spans the bottom of your screen - or the top if you prefer)

It comes with a couple of alternative skins (one is a cold-blooded clone of the WinXP Silver interface, the other an ultra barebones style) and it's fairly simple to create more.