11. Yahoo's Pipes

Yahoo Pipes is data mashup tool that can be used to aggregate, manipulate and mashup content from wide variety of sources around the web. Pipe word is taken from UNIX, where pipe is for transferring data between applications, but in this case it is for transferring data from one or more sources. It can be used to combine many feeds into one, sort, filter and translate. It can grab pipe's output as RSS, JSON, KML and other formats. It can be used to geocode your favorite feeds and remix your favorite data sources.

Read more at: http://pipes.yahoo.com/pipes/