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