My list:

Aliexpress alternativeto.net Amazon Apple AppStore ArXiv Bing Video BookFinder ISBN DHL Tracking Number DOI Resolver duckduckgo.com ebay.com Facebook HackerNews (Angolia search) ISBN Search Library Genesis MathOverflow Physics.StackExchange Scholarpedia Sci-Hub (DOI) SciRate (arXiv) Scite.ai Dictionary.com Thesaurus.com Tripadvisor.com Twitter Urban Dictionary Walmart Wayback Machine Wikipedia Wolfram Alpha Weather Underground Yelp YouTube Video Search images.google.com scholar.google.com maps.google.com news.google.com scholar.google.com video.google.com

I have about half of these memorized enough to use regularly.