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

SSLScrape | A scanning tool for scaping hostnames from SSL certificates.
Curated collection of wordlists for bug bounty hunting, covering directories, subdomains, parameters, usernames, passwords, and web fuzzing payloads.

Multiprocessing(Parallel)Subdomain Detect Script

Red team Arsenal - An intelligent scanner to detect security vulnerabilities in company's layer 7 assets.

Poor (rich?) man's bug bounty pipeline https://dubell.io

Some tools to automate recon - 003random

Stuff that doesn't deserves its own repository.

Web Application Security Automation Framework which recons the target for various assets to maximize the attack surface for security professionals &…

Automated web domain reconnaissance and security assessment tool integrating subdomain enumeration, port scanning, vulnerability scanning, and…

Rock-On is a all in one Recon tool that will just get a single entry of the Domain name and do all of the work alone.

Subdomain enumeration tool with analysis features for discovered domains

A scripted pipeline of tools to streamline the bug bounty/penetration test reconnaissance phase, so you can focus on chomping bugs.

Monitoring framework to detect and report newly found subdomains on a specific target using various scanning tools

Eliminate dangling elastic IPs by performing analysis on your resources within all your AWS accounts.

Go-based tool that scans webpages and JavaScript files to discover hidden subdomains and secrets, with optional crawling and real-time proxy analysis…

Ashok is a OSINT Recon Tool , a.k.a 😍 Swiss Army knife .

Crawls web applications to detect second-order subdomain takeover vulnerabilities by collecting URLs and matching configurable rules for non-200…