Scapy
Scapy is a free Python library for crafting, sending, sniffing and decoding network packets, built for security engineers on Linux, macOS and Windows.
Linux · macOS · Windows Open source
Networking apps
Software to design, emulate, run and monitor computer networks: emulators, routing suites, inventory and traffic analysis.
Scapy
ntopng
ntopng is a web-based network traffic probe from ntop for administrators and security analysts, with packages for Linux, Windows and macOS.
Linux · Windows · macOS · Web Open source
Ostinato
Ostinato is a paid network traffic generator with a graphical interface and a Python API, for testing switches and links on Windows, macOS and Linux.
Windows · macOS · Linux Paid
Catchpoint
Catchpoint monitors the availability and speed of websites and online services from over 3,000 agents, for large web and IT teams, on the Web.
Web · Linux · Windows · macOS Paid
Cisco ThousandEyes
Cisco ThousandEyes tracks Internet and SaaS performance from agents spread worldwide, for network and IT teams, used on the Web with Linux agents.
Web · Linux · Windows · macOS Free trial
Masscan is a free, extremely fast port scanner for auditors and security teams, built from source on Linux, macOS or Windows, for authorised networks only.
Linux · macOS · Windows Open source
EVE-NG
Multi-vendor network emulation platform you install on a server or VM and control from a web browser, with a free tier for learning.
Windows · macOS · Linux Free with in-app purchases
GNS3
Free, open source network emulator that runs real virtual routers and firewalls on a PC to build and test networks, on Windows, macOS and Linux.
Windows · macOS · Linux Open source