1-Subdomainer(contain sudfinder,amass whois mode,amass passive mode,crt/.sh,GitHub,gobuster,knockpy,)
2-chaos(Archived Data)
3-frogy(wayback,bbot,subfinder,findomain,
crt.sh)
4-assetfinder (certspotter,hackertarget,threatcrowd,wayback ,bufferover,facebook)