Linux Tools
SSH
MetaSploit
Grub
Nessus
OpenVAS
Snort
Nikto
Windows Tools
NetCat
VLC Streaming
Meterpreter
EtterCap
Mimikatz
HPing
ARPing
Wine
Hydra
John the Ripper
Password Wordlist
VSSOWN
File Hashing
Baseline Security Analyzer
Multi-OS Tools
nmap
Wireshark
Other Useful Tools (long list)
Other
Pentesting Tools