Quick Google is a useful Chrome extension. You can search Google without leaving the current page and see a preview of each result.

Google Homepage Reloaded is a greasemonkey script, which gives users the ability to click Google logo on Google homepage to change the website they search.

URL bar search is another handy Firefox add-on which makes searching easy with multiple search engines.

As the name suggests Twoogle = Twitter Search + Google Search.

KwiClick is an essential Firefox add-on for everyone who searches the web! You can search the internet right from your status bar, without leaving the current page.

Finally, Google brings “Real time search” option. Click on the ‘Show options…” link on the search result page and search the web with more options.

Gmail has some cool features and Search Mail is just one of them. This tool is another way to use Gmail as a power user. The mail search is blessed with some great operators, which will certainly increase your efficiency in dealing with e-mails.

There are several ways to integrate other search engines with Google result page. But, Matt Cutts has created a greasemonkey script for adding other search tools in the same manner as you may have seen in some April fool prank screenshots.

ChhotuGoogle is a nice tool to search in Hindi and Tamil. The site is powered by Google’s custom search and offers a very unique way to search in these Indian languages.

Sputtr is not a search engine, but a great  gateway to other search engines, blogs, services etc.

Frank Watson has noticed a change in the top search box of Gmail. The Search option is missing “Search Web” button!