PIP
Useful crossplatform library for distributed systems
Platform-Independent Primitives. Contain string, thread, timer, file, config file, serial port, ethernet (UDP, TCP, broadcast, multicast), protocol, multiprotocol, peer, console, variable, struct, evaluator, system monitor (Linux only), CLI (command-line interface) parser.
Package include library that you can build with 'qmake' or 'CMake' and test program in 'main.cpp'.
Online documentation: http://ppip.sourceforge.net/doc/