- Maltego is a program that can be used to determine the relationships and real world links between people, groups of people (social networks), companies, organizations, websites, Internet infrastructure, phrases, documents, and files.
- Recon-ng is a Web Reconnaissance framework with independent modules, database interaction, built in convenience functions, interactive help, and command completion, that provides an environment in which open source web-based reconnaissance can be conducted.
- FOCA(Fingerprinting Organizations with Collected Archives) is a tool used mainly to find metadata and hidden information in the documents its scans.
- Using FOCA, it is possible to undertake multiple attacks and analysis techniques such as metadata extraction, network analysis, DNS snooping, proxies search, fingerprinting, open directories search, etc.