Here is a list of search engines categorized by their primary focus or usage:
General Web Search Engines:
Google
Bing
Yahoo!
DuckDuckGo
Baidu (China-focused)
Specialized Search Engines:
YouTube (Video search)
Amazon (Product search)
eBay (Online marketplace search)
TripAdvisor (Travel search)
Indeed (Job search)
Zillow (Real estate search)
Social Media Search Engines:
Facebook Search
Twitter Search
Instagram Search
LinkedIn Search
Pinterest Search
Academic and Research Search Engines:
Google Scholar
Microsoft Academic
PubMed (Biomedical literature)
IEEE Xplore (Engineering and technology)
JSTOR (Scholarly articles and journals)
News Search Engines:
Google News
Bing News
Yahoo! News
Newslookup
NewsNow
Image Search Engines:
Google Images
Bing Images
Yahoo! Image Search
Pinterest
Yandex.Images
Video Search Engines:
YouTube
Vimeo
Dailymotion
Veoh
Metacafe
People Search Engines:
Pipl
Spokeo
Whitepages
PeekYou
BeenVerified
Torrent Search Engines:
The Pirate Bay
1337x
RARBG
Torrentz2
YTS (YIFY)
Privacy-Focused Search Engines:
DuckDuckGo
Startpage
Qwant
Searx
Swisscows
Local Search Engines:
Yelp
TripAdvisor
Zomato
Yellow Pages
Foursquare
Job Search Engines:
Indeed
LinkedIn Jobs
Glassdoor
Monster
SimplyHired
Please note that this list is not exhaustive, and there are many other search engines available that cater to specific niches or regions. Additionally, search engine availability and popularity can vary depending on the location and user preferences.