Gitem (GitHub organization reconnaissance tool)
Gitem is a reconnaissance tool to extract information about organizations on GitHub. It can be used to find the leaking of sensitive data.
SpiderFoot (OSINT tool)
SpiderFoot is an open source intelligence automation tool (OSINT). It automates the process of gathering intelligence, like IP addresses, domains, and networks.
XRay (reconnaissance and OSINT tool)
XRay is a security tool for reconnaissance, mapping, and OSINT gathering from public networks.