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.