C# SNMP Library (#SNMP) - Open source SNMP implementation for C#
A C library for asynchronous DNS requests
Fast and low latency asynchronous socket server & client C++ library
Cross-platform asynchronous I/O
A glib-like multi-platform c library
Library for interacting with command-line interfaces
A client library to multiplex connections from and to iOS devices
Async MySQL Connector for .NET and .NET Core
An Arduino NeoPixel support library
The official C++ client API for PostgreSQL
Stripe.net is a sync/async .NET 4.6.1+ client
A powerful server and network library, including coroutine
Library for reading and writing large multi-dimensional arrays
HTTP and WebSocket built on Boost.Asio in C++11
Serialization/RPC system - core tools and C++ library
The fastest and simplest library for SQLite3 in Node.js
.NET validation library for building strongly-typed validation rules
A go-style coroutine library in C++11 and more
Fast C++ logging library
A library for PHP with synchronous support
Convenience sockets library for FreeBSD & GNU/Linux
Coroutine-based concurrency library for PHP
A collection of coding patterns in no particular order
Cross-platform C++ library for use as a default application framework.
c++/java library for thread support and other useful stuff