ZScan
Single-file network scanner that runs where nothing can be installed
Python · PowerShell
TCP, SYN, UDP, FIN, NULL and XMAS scans with OS detection and version fingerprinting, plus 87 NSE-equivalent scripts — in one file, with zero installs.
Pure Python for Linux and Windows, and a pure PowerShell build for Windows-only environments. Works fully offline, which is the point: air-gapped and locked-down hosts are exactly where the usual toolchain is unavailable. Outputs JSON, XML or HTML.