Google Scholar - Google Scholar is a freely accessible web search engine that indexes the full text of scholarly...
Findify - Personalized eCommerce tool
Google Custom Search - Google Custom Search enables you to create a search engine for your website, your blog, or a collection of websites.
Queryly - Queryly Search Cloud helps readers find more relevant content instantly on the site.
ResearchGate - Access scientific knowledge, and make your research visible
Synthical - AI-powered collaborative research environment. You can use it to get recommendations of articles based on reading history, simplify papers, find out what articles are trending, search articles by meaning (not just keywords), and so on.