VyOS
VyOS is a free Debian-based network operating system (routing, firewall, VPN) for x86 servers, virtual machines and clouds, aimed at network teams.
Linux Open source
Networking apps
Software to design, emulate, run and monitor computer networks: emulators, routing suites, inventory and traffic analysis.
VyOS
LibreNMS
LibreNMS is a free SNMP network monitoring system with auto-discovery and alerting, built for administrators and carriers and run on a Linux server.
Linux · Web Open source
NetBox
NetBox is a free web application that documents a network’s IP addresses, racks, devices and cables, built for network teams and run on a Linux server.
Linux · Web Open source
FRRouting
FRRouting is a free routing suite (BGP, OSPF, IS-IS, PIM and more) for Linux and BSD, aimed at network engineers, hosting providers and data centres.
Linux 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