BotSpot

"The spot for all bots" is a large robot, crawler and spider directory with sections on:

Search Bots, Shopping Bots, Metasearch bots, Newsgroup search bots, Shop bots, Auction bots, Stock bots, Tracking Bots, Artificial Life Bots, Web monitoring bots, News bots, All the Chatterbots, Personal assistants, Download Bots, Web Development bots, File sharing bots, Download managers, Referencing bots, Site management bots, Surf Bots, Games Bots, Pop-up killer bots, Privacy bots, Build a Bot, Logic bots, and more...

UPDATE

Unfortunately, this service is no longer available, now a lame blog that's not worth a link.