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hakip2host
Takes a list of IP addresses then does a series of checks to return associated domain names.
Cake Fuzzer
Cutting-edge project designed to automate the continuous discovery of vulnerabilities in webapps.
Kscan
Kscan is an all-round scanner developed purely in Go, with functions such as port scanning, protocol.
Burp-Encode-IP
Burp Suite extension to encode an IP address focused to bypass application IP/domain blacklist.
Collaborator Everywhere
Burp Suite extension which injects non-invasive headers to reveal backend systems.