Mash-Up

A mash-up is a website (or music) which combines information from at least one source to make something new using the properties of the sources.

Wiktionary defines a mash-up as
 * 1)   (   computing [|slang]   )  A [|derivative work] consisting of two pieces of (generally [|digital]) [|media] [|conjoined] together, such as a [|video clip] with a different [|soundtrack] applied for humorous effect, or a digital map [|overlaid] with user-supplied data.

More informations about mash-ups can be found [|here].