EB Search via YubNub
YubNub takes the notion of search-form-as-command-line to a remarkable extreme, allowing quick access to an impressive set of commands by typing something like “mw augment” to the see Merriam-Webster definition for “augment” or random 100” to get a list of random numbers between 1 and 100.
YubNub has an eb command, which searches the Encyclopedia Britannica. For example, typing “eb sir raymond firth” will search Britannica for “sir raymond firth”.