Free peer-reviewed portable C++ source libraries
Boost provides free portable peer-reviewed C++ libraries. The emphasis is on portable libraries which work well with the C++ Standard Library. See http://www.boost.org
Dlib is a C++ toolkit containing machine learning algorithms and tools for creating complex software in C++ to solve real world problems.
Polygon and line clipping and offsetting library (C++, C#, Delphi)
The Clipper library performs clipping and offsetting for both lines and polygons. All four boolean clipping operations are supported - intersection, union, difference and exclusive-or. Polygons can be of any shape including self-intersecting polygons. 17 March 2016: Since it's been some time since the last update, some may be wondering if I no longer plan further updates. I do have plans for more updates but I also have a chronic health condition (not life threatening) that's set me back, and I don't really have a good idea when I'll restart development.
3D pointcloud data storage and interchange format
Reference Implementation of the ASTM 3D Imaging Format. A file format for interchange of 3D (laser) imaging data. (This work is not officially endorsed by ASTM.)
Cross-platform C++ libraries with a network/internet focus.
NOTE: Current source code as well as bugs/patches are on GitHub: https://github.com/pocoproject/poco/ C++ class libraries for network-centric, portable applications, integrated perfectly with the C++ Standard Library. Includes network protocols (Sockets, HTTP, FTP, SMTP, POP3, etc.), SQL database access and XML parsing. Licensed under Boost license.
Pugg is a c++ framework for plugin management. Features o Header only library, no installation o Auto loading of plugins from files o Version control for plugins o Object oriented design o Platform independent
A modern, portable CGI library written in standard C++. Asynchronous CGI and FastCGI are both supported in a clear, simple and efficient library built upon the Boost C++ libraries (esp. Boost.Asio). Free and commercial support available on request.
client and server HTTP(S) library for Boost C++ developers
The motivation of pion is not to build yet another web server or web application framework, but to help provide basic HTTP(S) functionality to new or existing C++ applications. If you're working on a Boost C++ application and would just like to use HTTP to provide a simple user interface or interact with run-time data, then pion might be for you.
The OpenCL Kernel Compiler compiles OpenCL kernel files and presents any compilation errors in a form commonly used by "regular" C/C++ compilers. It is intended to be used as a supporting tool for application developers working with OpenCL. Version 0.3.0 adds additional features for saving compiled binaries and selecting platforms/devices.
TRSL is a C++ library that implements several (statistical) sampling schemes behind an (STL-like) iterator interface. The library may be used e.g. in particle filtering. It is distributed under the Boost SL (BSL is a free-software license).
Library of generic, k-d tree multi-dimensional containers
Spatial is a generic header-only C++ library providing multi-dimensional in-memory containers, iterators and functionals. Spatial is a general purpose library with good overall performance thanks to its self-balancing k-d tree containers. Spatial makes it easy to search for nearest neighbors, orthogonal ranges, or perform ordering of objects in any number of dimensions. Spatial's design borrows heavily from the STL, and strives to follow it's elegant interface; therefore Spatial's containers, iterators and functionals integrate well with the STL. Additionally, Spatial's self-balancing kd-tree based containers, capable of object insertion and removal in fractional amortized time, prevent worst-case computational time on most operations. The latest release brings bug fixes and wide array of performance improvement across several algorithms. Nearest neighbor search, in particular, has been improved significantly.
A C++ UUID compliant to RFC 4122.
character set conversion library
charset is a c++ template library that aim to provide simple interface to convert between different character sets, the default implementation uses Unicode as the middle layer (also you can use Unicode, as source or target of conversion).
Assorted projects. General-purpose libraries for Python, C++, Scala, bash, and others. Meta-programming tools. System utilities. UI components. Web APIs. Configuration files. Benchmarks. Programming competition entries. And much more.
Spirit is an object oriented recursive descent parser generator framework implemented using template meta-programming techniques.
C++ library for working with OWL ontologies
The CML (Configurable Math Library) is a free, open-source C++ vector, matrix, and quaternion math library designed for use in games, graphics, computational geometry, and related applications. Please note: the CML source has moved to GitHub: https://github.com/demianmnave/CML
PapaFactory is a header-only C++ library providing three generic abstract factories. The library is licensed under the Boost software license which allows incorporation into propriety software.
Adax is an application that allows you to run any valid Flex/Flash9© file as a local executable, like Adobe AIR© does. It is entirely written in C++ using the STL and BOOST libraries. It can be compiled on Windows©, MacOS© (10.4 or higher) and LINUX.
A collection of miscellaneous libraries and tools for various programming tasks.
This is a C++ logging library implementation which is accepted to Boost. It aims for extensibility and flexibility while moderately affecting user's application performance. Since being accepted, the library is developed and distributed as a part of Boost. Please, visit www.boost.org for more info.
Elevations moves data from Excel to Unix systems. It connects VBA with Cygwin SSH, CGI and HTTP POST to deliver to a QuantLib C++ server through pipes. Provides C++ classes to process CSV files and the strings to C++ types. File schema definitions.
A C++ library for creating textual Domain Specific Languages (DSLs).
Loge is a general purpose C++ library ( this sounds way better then saying it's a bunch of classes I found suited for publishing ). The Name is a homage to Andrei Alexandrescu's Loki library. It's all ANSI C++ and tr1, and therefore platform indep