Google is an Internet search engine that enables users to search the Web for images, news, products, video and other content. It provides many tools and APIs. - [Read more]

Bing is a Microsoft's search engine formerly known as Live Search, Windows Live Search and MSN Search. It's advertised as a "decision" engine by the company. It lists search suggestions in real time as queries are typed and a list of related searches. It also includes the ability to save and share search histories via Windows Live SkyDrive, Facebook and email. - [Read more]

Ask, also known in the UK as Ask Jeeves, is a search engine that Internet users use to search for web sites, images, news, blogs, video, maps and directions, local search and shopping. - [Read more]

Yahoo! Search is a web search engine owned by Yahoo! Inc. It started as a web directory of other sites, organized in a hierarchy of categories, as negates to a searchable index of pages. Yahoo later evolved into a full-fledged portal in the 1990s with a search interface. Originally, it didn't do actual web crawling, storage and retrieval of data. In 2001 the search engine was powered by Inktomi and later by Google until 2004, when Yahoo! Search got its own web crawler and indexer. - [Read more]

Baidu is a Chinese search engine for websites, images and audio files. It provides community services such as Baidu Baike, a web-based collaboratively-built encyclopedia and a forum. - [Read more]

Cuil is a search engine that shows search results with images and a drill-down menu. It searches for and ranks pages based on their content and relevance. Find its general features, webmaster and investor information. - [Read more]

KeywordSpy is a search engine tool which tells you the exact terms and phrases that are driving the most traffic to your competitors' websites. Use it to perform advanced keyword research and tracking. Study the keywords your competitors have been using in Adwords and other PPC campaigns, to improve your own campaign. - [Read more]