Creating Mashups

For those of you interested in creating mashups (a website or web application that combines content from more than one source - wikipedia), then ProgrammableWeb is the place to go!

ProgrammableWeb showcases the latest mashup sites. For each site showcased, they provide a list of the mashup APIs used. They also have an API dashboard which provides a comprehensive database of API resources available to you as a developer and they have lots of tutorials and articles.

At the time of this writting, there are 1001 mashup sites showcased.