FreeRDP is a free remote desktop protocol library and clients
Cross-platform multi-protocol VPN software
High performance ping tool
ZMap is a fast single packet network scanner for network surveys
Emulator of x86-based machines based on PCem
Hobby operating system, bootloader, kernel, drivers, C library
Local DNS server to obtain the fastest website IP
Ncurses-based monitoring application for wireless network devices
The FRRouting Protocol Suite
SQL operating system instrumentation and monitoring framework
Operating system for the Sega Dreamcast
Fast and Lightweight Logs and Metrics processor for Linux, BSD, OSX
eBPF-based Linux kernel networking debugger
The Pi-hole FTL engine
CUPS is a standards-based, open-source printing system
Manage the notification of a newly available update
Communication framework for data-centric high-performance applications
GTK+ IRC client
WinDivert: Windows Packet Divert
Xymon monitors your hosts, your network services, and everything else.
An advanced network simulator to design and configure virtual networks
Open Source Monitoring System for performance and availability.