Take it like a gift

Extract domains/subdomains from URLs en masse.

The revolutionary architecture that powers Qualys' IT, security, and compliance cloud apps.

Backdoor generator and multi-session handler for sessions sharing among connected sibling servers.

CLI & library to search for default credentials among thousands of products/vendors.

ScriptSentry finds misconfigured and dangerous logon scripts.

Free Mac OS X computer forensics tool.

A powerful shell script to maximize the recon and data collection process.

View and modify HTTP requests before they are sent.

SSRF testing tool.

Windows persistence toolkit written in C#.

Collects RDP, web and VNC screenshots all in one place.

Truly open-source general purpose vulnerability scanner.

A free, open source, cross platform Intelligence gathering tool.

TCP port scanner, spews SYN packets asynchronously, scanning entire Internet in under 5 minutes.

A multi-platform fuzzer for poking at userland binaries and servers.