Sites that find information on a specific request, which can be anything, mail or even a password
1. search.carrot2.org — cluster search engine, identifies objects or categories associated with the word in the search query
2. boardreader.com — search engine on forums
3. searchcode.com — search by code in open repositories
4. swisscows.com — semantic search engine
5. intelx.io — will find email addresses, domains, URLs, IP addresses, CIDR, bitcoin addresses, IPFS hashes, etc
6. publicwww.com — search by source page code, you can search for nicknames, mail, trackers, wallets, website addresses, etc
7. psbdmp.ws — search in pastebin
8. kribrum.io — social-media search engine