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Disorder and chaos are interesting phenomena. Calculating the amount of entropy, information, or disorder in an information stream or data collection has many interesting applications. libdisorder provides a simple C library for calculating classic Shannon entropy (more to come in future releases).

This port contains the programming reference for devel/libbonobo.

Check is a unit test framework for C. It features a simple interface for defining unit tests, putting little in the way of the developer. Tests are run in a separate address space, so Check can catch both assertion failures and code errors that cause segmentation faults or other signals.

libedit provides command line editing functionality. Both emacs and vi key bindings are supported. Note that the base system also includes libedit, but this port is generally more current.

Libcwd is a thread-safe, full-featured debugging support library for C++ developers. It includes ostream-based debug output with custom debug channels and devices, powerful memory allocation debugging support, as well as run-time support for printing source file:line number information and demangled type names.

GCC, the GNU Compiler Collection supporting C and C++ for targetting crossbuilding.

A library which may be used to explain Unix and Linux system call errors. The library is not quite a drop-in replacement for strerror, but it comes close. Each system call has a dedicated libexplain function.

PWLib is a multi-platform code library that can be used to write applications that will compile and run on the BSD Unixes, Windows, Linux and a few other Unix variants. It was developed by Equivalence Ltd Pty. It is used by the OPAL library.

The libevent API provides a mechanism to execute a callback function when a specific event occurs on a file descriptor or after a timeout has been reached. Furthermore, libevent also support callbacks due to signals or regular timeouts. libevent is meant to replace the event loop found in event driven network servers. An application just needs to call event_dispatch() and then add or remove events dynamically without having to change the event loop. Currently, libevent supports /dev/poll, kqueue(2), event ports, select(2), poll(2) and epoll(4). The internal event mechanism is completely independent of the exposed event API, and a simple update of libevent can provide new functionality without having to redesign the applications. As a result, Libevent allows for portable application development and provides the most scalable event notification mechanism available on an operating system. Libevent can also be used for multi-threaded applications.

libgit2 is... licensed under a very permissive license so you can use it anywhere faster than any other Git library written in standards compliant C99 completely multi-platform: Windows, Linux, Mac OS X, xBSD compiled natively under all platforms (yes, even MSVC on Windows) re-entrant, with sane error handling designed with a solid and consistent API available as bindings for all major scripting languages