Libxslt is the XSLT C library developed for the GNOME project. XSLT itself is an XML language to define transformation for XML. Libxslt is based on libxml2 the XML C library developed for the GNOME project. It also implements most of the EXSLT set of processor-portable extensions functions and some of Saxon’s evaluate and expressions extensions.

People can either embed the library in their application or use xsltproc the command line processing tool. This library is free software and can be reused in commercial applications.

Crypto++ Library is a free C++ class library of cryptographic schemes. One purpose of Crypto++ is to act as a repository of public domain (not copyrighted) source code. Although the library is copyrighted as a compilation, the individual files in it (except for a few exceptions listed in the license) are in the public domain. Currently the library consists of the dozen to do’s, some of which are other people’s code, repackaged into classes.

GAlib contains a set of C++ genetic algorithm objects. The library includes tools for using genetic algorithms to do optimization in any C++ program using any representation and genetic operators. The documentation includes an extensive overview of how to implement a genetic algorithm as well as examples illustrating customizations to the GAlib classes. GAlib is free. It is distributed under a BSD-style license. It has been built on many platforms with many compilers. GAlib includes examples that use PVM for distributed, parallel implementations. GAlib includes graphic examples that use the Athena or Motif widget sets, or MFC.

V is a free, multiple platform C++ graphical user interface framework designed to make it the easiest way to write C++ GUI applications available - commercial, shareware, or freeware. V is available for X Athena, X Motif/Lesstif, all Windows platforms. The V IDE for GNU g++, Borland BCC 5.5, and Java is an Integrated Development Environment developed using V. It works with the GNU g++ compiler and Sun’s JDK for Java. It is available in executable form for MS-Windows and Intel Linux platforms. The VIDE executable is totally freeware, and the source is available under the GNU GPL as part of the V GUI Framework.

Claimed to be the largest commercially available collection of numerical algorithms for C. It is a collection of mathematical and statistical algorithms for C and C++ programmers. Containing over 1000 functions covering a wide range of mathematical and statistical areas, available on a wide range of systems commonly used for technical computing.

CGIC is ANSI C library for CGI Programming.