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DARPA research program that developed domain-specific search methods for hard-to-index web content.

OSINT.sh tool for checking historical DNS records and domain infrastructure changes.

is a website that will help you discover hosts related to a specific domain.

Domain Tools is a web tool for finding, checking, or analyzing online information related to domains, networks, and digital services.

Forward Email

forwardemail.net

Open-source email forwarding and hosting for custom domains, with unlimited aliases, standards-based mail access, and encrypted-storage options.

The site allows you to look up domain registration information (WHOIS) on the internet

Threat intelligence platform aggregating malicious IP and domain data from multiple security feeds with real-time reputation scoring and threat catego

Network diagnostic toolbox for DNS, MX, blacklist, SMTP, and domain health checks.

Finds email addresses, domains, and URLs connected to a company or domain for OSINT and sales research.

is an IP address and domain name based researching websites that offers multiple services such as Reverse DNS Lookup, Whois, and AS Macros.

SimilarSites

similarsites.com

Discovery tool for finding websites similar to a domain, brand, or online service.

Open-source email alias service for receiving and replying without exposing a personal address, with apps, extensions, custom domains, and self-hosting support.

SitesLike

siteslike.com

Website discovery tool for finding similar websites by category, topic, or domain.

OSINT.sh tool for discovering subdomains connected to a target domain.

OSINT.sh tool for checking historical WHOIS records and domain ownership changes.

Verisign WHOIS lookup for checking domain registration records and registry information.

WHOIS intelligence service for searching domain ownership, history, and registrar data.

Free DNS, WHOIS, DKIM discovery, SPF/DMARC analysis and blacklist checks with plain-English results, no signup.

Free, no-login IP reputation lookup that aggregates up to 8 risk sources, flags residential vs datacenter, and profiles /24 C-block neighbors. Also of

Is a free platform offering network diagnostic tools (ping, traceroute, MTR, DNS, WHOIS, HTTP, etc.) tailored for ISPs and infrastructure professional

Free ebook library offering public-domain books, classic literature, and downloadable texts.

is a website that gives you a free and comprehensive report about a specific website.

altern.ai

altern.ai

Feel free to contribute and also submit your AI tools on for free.

Central University of Technology, Free State (Bloemfontein, South Africa) is known for Environmental Science, Energy and Social Sciences.