RSS Colours - Take the "colour" (generally positive or generally negative) of a given RSS feed by counting positive and negative words.
Archers-O-Matic - Find out the dates, times and synopses of upcoming episodes of BBC Radio 4 show, The Archers.
Last.FM National Popularity Match - Discover how similar your musical taste is to that of an entire country.
Strange Unit Calculator - Convert any distance into unusual (yet oddly familiar) units.
Action Movie Bingo - Turn the unoriginality of action movie directors to your benefit with this automatically-generated bingo card.
WikiTree - Find your way through the maze of Wikipedia without having to go through the bother of actually looking at it.
Dada Haiku - Automatically construct haiku by picking random words from the dictionary. Guaranteed to have the right syllable count, and also guaranteed not to make any sense whatsoever.
BBC News Headline Editor - A Greasemonkey script designed to customise the news headlines on the BBC News website.
Ficlets Filter - Another Greasemonkey script, designed to remove any authors from the "Browse Stories" page on Ficlets.