1.nmap / nmapNmap - the Network Mapper. Github mirror of official SVN repository.c-plus-plusluasecurityport-scannermachine-learninglinux+11 moreCOther license14K total3K forks+1,201 starsfrom 12,730 · score 7.09
2.robertdavidgraham / masscanTCP port scanner, spews SYN packets asynchronously, scanning entire Internet in under 5 minutes.CAGPL-3.026K total3.2K forks+662 starsfrom 25,461 · score 6.50