Curated web resources include targeted, free databases, additional search engines, websites for particular areas of interest, and curated subject lists.

EasyBib (Chegg) Web address evaluation tool

Try different search engines for a non-Google search experience.

Infotopia - custom search engine that uses various filters to produce clearer results

Sweetsearch - searches only credible Web sites approved by Internet research experts

Mentormob - visual search engine     

100 Time-Saving Search Engines for Serious Scholars

Research Beyond Google: 119 Authoritative, Invisible, and Comprehensive Resources  

ACADEMIC & SCHOLARLY SEARCH ENGINES

https://scholar.google.com  - for Google scholarly research 

http://www.base-search.net - BASE is a search engine especially for academic open access web resources

http://www.refseek.com - comprehensive subject coverage without information overload of a general search engine: increases the visibility of academic information

http://academic.research.microsoft.com - covers more than 48 million publications: large collection of data  allows users to create several innovative ways to visualize and explore academic papers, authors, conferences, and journals.

Cookie-free search engines.

DuckDuckGo

StartPage

- Social Studies
- Statistical & Population  
- Science and Medicine
- Mathematics
- Government