Asio

Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

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.

Overview: An overview of the features included in Asio, plus rationale and design information.
Using Asio: How to use Asio in your applications. Includes information on library dependencies and supported platforms.
Tutorial: A tutorial that introduces the fundamental concepts required to use Asio, and shows how to use Asio to develop simple client and server programs.
Examples: Examples that illustrate the use of Asio in more complex applications.
Reference: Detailed class and function reference.
Index: Book-style text index of Asio documentation.