https://www.kitploit.com/2018/01/infoga-email-information-gathering.html
VoilaNorbert (Email Assumptions Tool) https://voilanorbert.com
FindAnyEmail (Email Assumptions Tool with Validation) http://findanyemail.net
Email Assumption Doc (Guesses Email by Username) https://docs.google.com/spreadsheet/ccc?key=0AuGhK_UJ-XImdEtKZ2Qzb3RtTUMydldESzUwS09jblE&usp=sharing
Email Assumption Doc (Guesses Email by Name) https://docs.google.com/spreadsheet/ccc?key=0AuGhK_UJ-XImdHBldXBtcWIzTXFuWGNld0xjRDJ3elE&usp=drive_web
Reverse Genie (Meta Search) http://reversegenie.com/email.php
Whoismind (Reverse Email to Websites) http://whoismind.com
ThatsThem (Reverse Email Lookup) http://thatsthem.com/find-people-email-search
MailTester (Email Validation) http://mailtester.com/testmail.php
VerifyEmail (Email Validation) http://verify-email.org
VerifyEmailAddress (Email Validation) https://tools.verifyemailaddress.io
Email Validator (Bulk Email Validation) http://e-mailvalidator.com/index.php?page=home
BytePlanet (Bulk Email Validation) http://email-validator.net
PeepMail (Email Identification) http://samy.pl/peepmail/elift.cgi
Pipl Email (Email Search) http://pipl.com
EmailSherlock (Email Search) http://emailsherlock.com
Email Permutator (Predicts Email) http://metricsparrow.com/toolkit/email-permutator/
Toofr (Business Email Guess) https://toofr.com/auth/login
Email Format (Addresses and Format for Business) http://email-format.com
Compromised Email (DB of Hacked Emails) https://shouldichangemypassword.com
HackNotifier http://pwnedlist.com
Breach or Clear http://breachorclear.jesterscourt.cc
Email Hunter (Display Domain Email Addresses) https://emailhunter.co