Heapr allows you to search Google, Wolfram Alpha, Twitter, and Flickr all at once.

Features:

• Search Google, Wolfram Alpha, Twitter, Flickr all at once
• Clean and fast
• Browser addon available

Heapr is the creation of Rudy Harjanto.

To learn about what is new from Heapr, simply follow the updates on Twitter @rharjanto.

Goofram a search service that displays search results from both Google and WolframAlpha side by side.

Features:

• Search Googe and WolframAlpha simultaneously
• Compare the search results of Google and WolframAlpha on one screen, which brings the best of the 2 schools
• Firefox search Add-on available

FusionSearch.us is a search service that combines results from several search engines, and shows them in a very simple but yet good-looking way. The interface is built in AJAX for maximum performance, and the interface even supports caching. This means that while you’re reading Page 2, page 3 is already pre-cached, and will show instantly when you click it.

Triplify : Triple Simplify Engine – Search, Compare and Sort results from the main three engines – Google, Yahoo and MSN Live.

Sputtr.com is an Alternative Search Engine that makes searching the Web quick and easy, because it has all the best searches on a single page. Give it a try!

Search suggestions and completions from the top providers on the internet. Easy to use, fast and efficient. Hit the right arrow to change engines, and use your arrow keys to search without all the typing. Let the web help.

MetaCrawler uses innovative metasearch technology to search the Internet’s top search engines, including Google, Yahoo! Search, MSN Search, Ask Jeeves, About, MIVA, LookSmart and more.

With one single click, MetaCrawler searches the best results from the combined pool of the world’s leading search engines — instead of results from only one single search engine.

And MetaCrawler makes it easy to refine your search so you can find the most meaningful results right away. No wonder it’s a leader in the search industry.

Uncover more of the web with metasearch! Mamma.com collects only the top results from the best search engines on the Internet.

Dogpile puts the power of all the leading search engines – Google, Yahoo!, Live Search, and Ask – together in one search box to deliver the best combined results. The process is more efficient and yields more relevant results.