username_osint.txt

Username enumeration web apps
whatsmyname.app
usersearch.org
Username enumeration command line tools
Sherlock (https://github.com/sherlock-project/sherlock)
Maigret (https://github.com/soxoj/maigret/)
WhatsMyName (https://github.com/WebBreacher/WhatsMyName)
Generate username variations by first/last name
NAMINT (https://seintpl.github.io/NAMINT/)
Username generation guide (https://github.com/soxoj/username-generation-guide)
IP search engines queries
Search in Shodan http.html:username
Search in Shodan http.title:username
Search in Netlas http.title:username
Search in Netlas http.body:username
Search in Netlas http.meta:username
Search in Netlas uri:*username*
Similar queries can also be made in Censys, ZoomEye, Onyphe, Fofa etc
Google queries
intitle:username
inurl:username
username filetype:xls
username filetype:xlsx
username filetype:sql
Marple (https://github.com/soxoj/marple) - tool for automation Google inurl search
Domain name search
who.is
Search in Netlas domain:*nickname*
Mentions in social media
social-searcher.com
brandmentions.com (last 7 days free)
Don't forget about internal social media search