Asio is a cross-platform C++ library for network and low-level I/O programming that provides developers with a consistent asynchronous model using a modern C++ approach.

Nebula is a peer-to-peer networking tool based on the Noise Protocol Framework. It is not a fully decentralized network, but instead uses central discovery nodes and a certificate authority to facilitate direct, encrypted peer-to-peer connections from behind most firewalls and NAT layers.

ipcalc takes an IP address and netmask and calculates the resulting broadcast, network, Cisco wildcard mask, and host range. By giving a second netmask, you can design subnets and supernets. It is also intended to be a teaching tool and presents the subnetting results as easy-to-understand binary values.

This library provides methods for using the stream control transmission protocol (SCTP) in a Go application.

OpenRDAP is a command line client for the Registration Data Access Protocol. RDAP is modern a replacement for WHOIS, which provides domain name and IP address registration information in JSON format over HTTP.

This package provides the NBD (Network Block Devices) client and server. It allows you to use remote block devices over a TCP/IP network.

Aircrack-ng is a complete suite of tools to assess WiFi network security. It focuses on different areas of WiFi security: monitoring, attacking, testing, and cracking. All tools are command-line driven, which allows for heavy scripting.

pproxy is an asynchronuous proxy server implemented with Python 3 asyncio. Among the supported protocols are HTTP, SOCKS and SSH, and it can use both TCP and UDP as transport mechanisms.

libdnet provides a simplified, portable interface to several low-level networking routines, including network address manipulation,kernel arp(4) cache and route(4) table lookup and manipulation, network firewalling, network interface lookup and manipulation, IP tunnelling, and raw IP packet and Ethernet frame transmission.

iPerf is a tool to measure achievable bandwidth on IP networks. It supports tuning of various parameters related to timing, buffers and protocols (TCP, UDP, SCTP with IPv4 and IPv6). For each test it reports the bandwidth, loss, and other parameters.

This package provides a wireless network and device detector, sniffer, wardriving tool, and WIDS (wireless intrusion detection) framework. Kismet works with Wi-Fi interfaces, Bluetooth interfaces, some SDR (software defined radio) hardware like the RTLSDR, and other specialized capture hardware

RTMPdump is a toolkit for RTMP streams. All forms of RTMP are supported, including rtmp://, rtmpt://, rtmpe://, rtmpte://, and rtmps://.

Quagga is a routing software suite, providing implementations of OSPFv2, OSPFv3, RIP v1 and v2, RIPng and BGP-4 for Unix platforms.

The Quagga architecture consists of a core daemon, zebra, which acts as an abstraction layer to the underlying Unix kernel and presents the Zserv API over a Unix or TCP stream to Quagga clients. It is these Zserv clients which typically implement a routing protocol and communicate routing updates to the zebra daemon.

libplum (Port Lightweight and Universal Mapping) is a high-level library which allows forwarding ports on Network Address Translators (NAT). Under the hood, it implements multiple protocols and automatically detects which one to use:

• Port Control Protocol (PCP)

• NAT Port Mapping Protocol (NAT-PMP)

• UPnP Internet Gateway Device Protocol (UPnP-IGD)

The ngtcp2 project is an effort to implement the RFC9000 (IETF) QUIC protocol.

bmon is a monitoring and debugging tool to capture networking-related statistics and prepare them visually in a human-friendly way. It features various output methods including an interactive curses user interface and a programmable text output for scripting.

Asio is a cross-platform C++ library for network and low-level I/O programming that provides developers with a consistent asynchronous model using a modern C++ approach.

iwd is a wireless daemon for Linux that aims to replace WPA Supplicant. It optimizes resource utilization by not depending on any external libraries and instead utilizing features provided by the Linux kernel to the maximum extent possible.

VDE is a set of programs to provide virtual software-defined Ethernet network interface controllers across multiple virtual or physical, local or remote devices. The VDE architecture provides virtual counterparts to hardware components such as switches and cables.

FRRouting (FRR) is an IP routing protocol suite which includes protocol daemons for BGP, IS-IS, LDP, OSPF, PIM, and RIP.

LibCamera is a complex camera support library for GNU+Linux, Android, and ChromeOS.

Spiped (pronounced "ess-pipe-dee") is a utility for creating symmetrically encrypted and authenticated pipes between socket addresses, so that one may connect to one address (e.g., a UNIX socket on localhost) and transparently have a connection established to another address (e.g., a UNIX socket on a different system). This is similar to 'ssh -L' functionality, but does not use SSH and requires a pre-shared symmetric key.

C library implementation of RaptorQ Forward Error Correction for Librecast. RFC6330 (IETF) describes the RaptorQ proposed standard, which LCRQ more-or-less follows. The primary focus has been on building a fast, simple and dependency-free FEC implementation for use with Librecast, and not on strict standards compliance. The code does, however, fairly closely follow the RFC.

librdkafka is a C library implementation of the Apache Kafka protocol, containing both Producer and Consumer support.