github.com/n0kovo/subsnort (go): Blazingly fast, unconventional yet surprisingly competent subdomain discovery tool written in Go, what will recursively crawl websites within a user-defined scope, looking for subdomains.
Keywords: bugbounty|bugbounty-tool|bugbountytips|enumeration|information-gathering|information-gathering-tools|infosec|infosectools|recon|reconnaissance|redteam|redteam-tools|subdomain|subdomain-enumeration|subdomain-recon|subdomain-scanner|subdomains