OpenThread released by Google is an open-source implementation of the Thread networking protocol

Network utility for sending / receiving TCP, UDP, SSL, HTTP

A multi-platform support c++11 library with focus on asio (asynchronous socket I/O) for any client applications.

C++ library for creating an embedded Rest HTTP server (and more)

SSH/HTTP(S) multiplexer. Run a webserver and a sshd on the same port w/o changes.

OpenThread Border Router, a Thread border router for POSIX-based platforms.

用于搭建高性能、全异步、树形结构的BUS消息系统的跨平台框架库

Socket and Networking Library using msgpack.org[C++11]

Wireless Network Interface Daemon for Low-Power Wireless SoCs

lots of performance (or lots of porn, if you prefer) httpd: Easy, chrooted, fast and simple to use HTTP server for static content. Runs on Linux, BSD, Android and OSX/Darwin. It's free but if you like it, consider donating to the EFF: https://supporters.eff.org/donate

Whitefield provides a simulation environment for wireless sensor networks by combining RF simulation provided by NS3 and network stack provided by popular IoT OSes such as Contiki/RIOT/OpenThread.

Enables access to GameStream servers over IPv6 (included in Internet Hosting Tool)

Minimal IPv6 library for Ethernet controllers on Arduino

The Symphony Media Bridge (SMB) is a media server application that handles audio, video and screen sharing media streams in an RTC conference system.

unix socket interface for C++ raw IP/IP6/UDP/TCP, Layer2 etc. framework

Small and fast cross-platform networking library, with support for messaging, IPv6, HTTP, SSL and WebSocket.

C++ socket and address library

R package for IP addresses

A library for working and manipulating IPv4/IPv6 addresses and networks

DHCP4, DHCP6, and IPv6 Router Advertisement server.