✤Bing
✤Bing Visual Search refine queries through selecting images
✤Wolfram|Alpha (computational knowledge engine)
✤Goofram (search Google & Wolfram|Alpha together)
✤Browsys (search across the search tools)
✤Search Cube (visual page search)
✤Yebol (semantic search)
✤Wiki.com (for searching wikispace)
✤Twoogle (searches Google and Twitter simultaneously)
✤Findhow (How-Tos from Names You Trust)
✤Buttonall (the Internet's universal remote meta-search)
✤Clusty(clustered search)
✤AllMyFaves (choose you search tools among a bunch of categorized icons)
✤Kartoo (visual search)
✤Twurdy (results ranked by reading level)
✤Quintura (Search through tag clouds)
✤Soople (busts out Google's features)
✤AltaVista(Advanced),
✤Wayback Machine (archived web pages)
✤Boolify Project (an educational boolean search tool, currently in beta)
✤SweetSearch (selective searching)
Really Cool Links to help you “Go Beyond Google”
✤AllMyFaves (one page icon directory of search tools)
Semantic search tools (structured, intelligent results)
This amazing collection of tools were found here