Yahoo! Pipes is a
Web application from
provides a GUI-based interface for building applications that aggregate
and other services, creating Web-based apps from various sources, and publishing
those apps. The site works by letting users "pipe" information from different
sources and then set up rules for how that content should be modified (e.g.
filtering). A typical example is New York Times thru Flickr, a pipe which takes
the New York Times RSS feed and adds a photo from Flickr based on the keywords
of each item. The site is currently in beta.