OSINT Toolkit
People Search
social-analyzer
socialscan
Username Checker
https://biznar.com/
https://searchusers.com/
IDCrawl | Social Media Profile Lookup
Instant Username Search
Kik Usernames | Find People on KiK
Name Checkup
Namecheck.bloggingehow.com
namecheckr | Social and Domain Name Availability Search For Brand Professionals
Namevine
PeekYou
SearchPOF.com - Search POF by Username
SocialFinder(NSFW) | Manual Profile Discovery
User Searcher
Username Search | Social Media Profile Lookup | BeenVerified
UserSearch | Search Dating Sites | Reverse User Lookup