OWASP Amass - An advanced open source tool to help information security professionals perform network mapping of attack surfaces and external asset discovery using open source information gathering and active reconnaissance techniques!

DataWalk - DataWalk is a software platform to connect numerous large data sets, both external and internal, into a single repository for fast visual analysis.

Sublist3r - Sublist3r is a python tool designed to enumerate subdomains of websites using OSINT.

Lampyre - Lampyre - an efficient data analysis and OSINT multi-tool for everyone.

Spyse - A search engine which collects, processes, and provides structured information about network...

Maltego - Maltego is an open source intelligence and forensics application.