APE is a C++ class library primarily for development of threaded servers in a portable manner. A separate source tree is maintained for both pthread "Posix" targets (Linux, xBSD, Solaris, etc), and for win32 targets. The goal is to provide a truly common framework for C++ for writing portable, threaded, server applications that do not require a huge amount of runtime overhead to support, and hence can make C++ and threads suitable even for development of trivial servers and services.