OSINT

Open Source INTelligence, is the activity of gathering information by consulting publicly available sources.

OSINT Frameworkosintframework.com

Tool	Description
theHarvester	Lets you collect emails, names, subdomains, IP addresses, and URLs from various public data sources.
sherlock	Search for a person's different social media accounts by username.
recon-ng	Full-featured reconnaissance framework.
maltego	All-in-one platform for open-source intelligence and cyber investigations. Is a graphical link analysis tool
FOCA	Tool to find metadata and hidden information in the documents.