If you look for a picture’s source: http://www.tineye.com/

Looking for content that went offline? http://archive.org/web/web.php

A metasearchengine: http://metager.de/

The searchengine of all searchengines: http://www.joongel.com/

Anonymous searchengine that does not collect your userdata: https://startpage.com/

A different metasearchengine: http://www.metasuchmaschine.org/

Searchengine for text: http://archive.org/details/texts

Scientifical searchengine: http://www.mendeley.com/

Searchengine for web-copies and plagiarism: http://www.copyscape.com/

Anonymous searchengine: http://gibiru.com/

PDF and E-BOOK searchengine: http://www.pdf-searcher.com/

Dictionary in picture and text: http://www.wolframalpha.com/

Videosearchengine on 35 Video-platforms: http://www.blinkx.com/

The coolest 3D searchengine: http://search-cube.com/

Visual searchengine of a different kind: http://www.oskope.com/

3d window searchengine: http://www.spacetime.com/

3D video searchengine with a cool videowall: http://galaxy.tkaap.com/

Our favourite to search videos and pictures: http://www.cooliris.com/yoursite/express/builder/