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The search engine everyone used before Google — fast, powerful, and the first with a full-text, boolean-searchable index of the web. It also gave the world Babel Fish, the free page-translator named after the fish from The Hitchhiker's Guide to the Galaxy.
The search engine with a cartoon butler you asked full questions in plain English. Type "How tall is the Eiffel Tower?" and Jeeves would fetch the answer — a friendlier face on the early web.
The wolf-spider-named search engine with the eager black Labrador that would 'Go Get It!' One of the first search giants — briefly bigger than Yahoo — and one of the great cautionary tales of the dot-com bubble.