The web app YubNub may have been created for the 24-hour Rails Day programming contest, but it’s a great concept. YubNub is essentially command line for the web. For example:

After setting it up on your browser, you simply type “gim porsche 911″ to do a Google Image Search for pictures of Porsche 911 sports cars. Type “random 49″ to return random numbers between 1 and 49, courtesy of random.org.

Of course, YubNub is extensible as you can create your own commands. It is also somewhat a small part of a bigger idea.

…[O]n a bigger scale, YubNub is the realization of a very big idea: the URL command line of the web OS.