Synopsis is a multi-language source code introspection tool that provides a variety of representations for the parsed code to enable further processing such as documentation extraction, reverse engineering, and source-to-source translation. Synopsis provides a framework of C++ and Python APIs to access these representations and allows Processor objects to be defined and composed into processing pipelines, making this framework very flexible and extensible.

The constraint package is a constraint satisfaction problem solver written in 100% pure Python. The implementation uses constraint propagation algorithms. Constraints and Domain implementations are provided to work with finite domains and finite intervals. It should be fairly easy to add new kind of domains such as finite integer domains, together with specialized constraints.

EasyPG is an all-in-one GnuPG interface for Emacs. It consists of two parts: EasyPG Assistant and EasyPG Library. EasyPG Assistant is a set of convenient tools to use GnuPG from Emacs. EasyPG Library is a sort of an elisp port of GPGME, a wrapper library which provides API to access some of the GnuPG functions.

This document describes a C library implementation of a new polygon clipping algorithm. The techniques used are descended from Vatti's polygon clipping method. Subject and clip polygons may be convex or concave, self-intersecting, contain holes, or be comprised of several disjoint contours. It extends the Vatti algorithm to allow horizontal edges in the source polygons, and to handle coincident edges in a robust manner. Four types of clipping operation are supported: intersection, exclusive-or, union or difference of subject and clip polygons. The output may take the form of polygon outlines or tristrips.

ICU is a mature, widely used set of C/C++ and Java libraries providing Unicode and Globalization support for software applications. ICU is widely portable and gives applications the same results on all platforms and between C/C++ and Java software.

LÖVE is an open-source 2D game engine which uses the versatile Lua scripting language to create dynamic gaming experiences. It relies on OpenGL graphics and the SDL interface library to allow for cross-platform implementation and is an all-encompassing gaming environment for the development and enjoyment of 2D games.

The goal of the GNU PDF project is to develop and provide a free, high-quality, complete and portable set of libraries and programs to manage the PDF file format, and associated technologies.

OpenAL Soft is a cross-platform software implementation of the OpenAL 3D audio API. It's built off of the open-sourced Windows version available originally from the SVN repository at openal.org.

The JIT is an advanced JavaScript infovis toolkit based on 5 papers about different information visualization techniques. The JIT implements advanced features of information visualization like Treemaps (with the slice and dice and squarified methods), an adapted visualization of trees based on the Spacetree, a focus+context technique to plot Hyperbolic Trees, and a radial layout of trees with advanced animations (RGraph).