As soon as Wolfram Alpha launched as a computational knowledge engine, avid searchers hacked up tools to combine its results with standard Google searches. The Goofram site is a clean-looking site that does all that mashing for you.
That's just about all the main Goofram site provides, although with the two search sites' results fit well enough to the page that it almost looks like a natural app. If the idea of broad search reach appeals to Firefox users, they can install a Goofram Firefox add-on that automatically brings Google searches back to Goofram. If you just want Goofram for occasional searching, the site also offers a link for installing the site as one of your Firefox quick search box options. Free to use, no sign-up required.