#1Subdomain discovery, DNS brute-force, certificate transparency, and asset enumeration tools.
Kitploit recommended

A high-performance DNS stub resolver for bulk lookups and reconnaissance (subdomain enumeration)
In-depth attack surface mapping and asset discovery

dnsx is a fast and multi-purpose DNS toolkit allow to run multiple DNS queries of your choice with a list of user-supplied resolvers.

Open-source security research tool for identifying origin IP exposure of websites protected by Cloudflare and similar reverse proxy services.

Recon is a script to perform a full recon on a target with the main tools to search for vulnerabilities. Created based on @ofjaaah and @Jhaddix…

AI-powered bug bounty hunting toolkit that works with or without subscription.

Open-source web security testing platform: proxy, scanner and fuzzer in one CLI. By Pennacle Security.

Useful tool to track location or mobile number

High-speed DNS resolver and subdomain bruteforcer with accurate wildcard filtering and DNS poisoning validation for precise reconnaissance.

Batch asset collection and vulnerability scanning tool for red teams. Pulls targets from Hunter, Fofa, and Quake, performs fingerprinting, subdomain…

Multi-phase reconnaissance and attack-surface scanner that maps domains, IPs, ASNs, cloud assets, and CVEs into a knowledge graph with CVSS scoring…

Automated network asset, email, and social media profile discovery and cataloguing.

Sudomy is a subdomain enumeration tool to collect subdomains and analyzing domains performing automated reconnaissance (recon) for bug hunting /…

reNgine is an automated reconnaissance framework for web applications with a focus on highly configurable streamlined recon process via Engines,…

Terminal UI for attack surface discovery: DNS recon, subdomain enumeration, port scanning, reverse IP, leaked login URLs, and JavaScript secret…

Automated Penetration Testing Framework - Open-Source Vulnerability Scanner - Vulnerability Management

Tool to discover external and internal network attack surface

Offline-first Android offensive security toolkit with 21 modules for recon, port scanning, subdomain enumeration, SQLi/XSS/JWT exploitation, payload…