1.nmap / nmapNmap - the Network Mapper. Github mirror of official SVN repository.c-plus-plusluasecurityport-scannermachine-learninglinux+11 moreCOther license14K total3K forks+683 starsfrom 13,248 · score 6.53
2.robertdavidgraham / masscanTCP port scanner, spews SYN packets asynchronously, scanning entire Internet in under 5 minutes.CAGPL-3.026K total3.2K forks+264 starsfrom 25,859 · score 5.58