Nmap - Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.
CrackStation - CrackStation is a web-based service that is used for retrieving passwords by cracking their hashes.
Fing - Discover which devices are connected to any Wi-Fi network, map devices, detect intruders, assess...
MDCrack - MDcrack is a an aggressive cracker for MD2 MD4 MD5 HMAC-MD4 HMAC-MD5 NTLM PIX IOS APACHE FREEBSD IPB2 CRC32 CRC32B ADLER32 hashes
SoftPerfect Network Scanner - Powerful multipurpose network administration tool for Windows and macOS
hashcat - The World's Fastest CPU/GPU powered password cracker.