SIREN.io - Siren is an investigative intelligence platform.
ZabaSearch - Find people free with Zabasearch directory engine that includes free people search, reverse phone number lookup, address lookup, and more.
DataWalk - DataWalk is a software platform to connect numerous large data sets, both external and internal, into a single repository for fast visual analysis.
RealPeopleSearch - RealPeopleSearch is a web-based software that allows you to get the basic and public record of the concerned person within a few minutes by providing little information.
SpiderFoot - Open source intelligence (OSINT) automation tool.
ThatsThem - ThatsThem is one of the best 100% free personals look locales to tag along since ZabaSearch.