Popular Search Engines
Google - no description needed
Bing - Microsoft's attempt at a search engine
Yahoo - no description needed
DuckDuckGo - Concerned about online privacy? DuckDuckGo prides themselves as being the search engine that does not track or personalize your searches and results. They even offer handy visual guides on Google tracking and filter bubbling.
Meta Search Engines
Webopedia - An encyclopedic resource dedicated to searching technology terminology and computer definitions.
Dogpile - A metasearch engine that fetches results from Google, Yahoo!, Yandex, Bing, & other popular engines including those from audio and video content providers.
Yippy - Yippy is a Deep Web engine that searches other search engines for you. Powered by IBM Watson.