DuckDuckGo is a privacy focused search engine.

Disconnect lets you search privately. Prevent search engines from tracking your searches.

Add to Search Bar lets you add the search functionality of any page to the search box with no effort.

TinEye is a reverse image search engine. Search by image: Give it an image and it will tell you where the image appears on the web.

DeeperWeb is a free metasearch engine for information on the World Wide Web that employs tag cloud techniques for navigating through Google search results. To…

Bubblehunt is search platform, where you can create own search system.