Reconnaissance covers gathering information through passive and active techniques like subdomain enumeration, asset discovery, and ASN/IP lookup tools.

NeroSwarm Deception Lab offers free cyber deception tools including honeytoken creation, honeypot script generation, and IP threat reputation checking.

Nerva is a high-performance CLI tool for fast service fingerprinting across 120+ protocols (TCP/UDP/SCTP), built by Praetorian for network reconnaissance.