cool open source projects on concurrent space?

I am 开发者_JS百科looking for cool open source projects in the concurrent programming space in C and C++ which require active developer contribution. I am domain neutral, but would appreciate something more in the maths/statistics related areas. Any heads up people?

Boost C++ Libraries collection

I would suggest taking a look at the boost C++ library collection. There are several interesting libraries that deal with concurrent processing, and working on those libraries will drastically improve your own general and cross platform c++ programming skills. Some of their libraries are related to concurrency. The nice thing about boost is that is widely distributed, and is the source of many changes present in the C++0x update to the C++ standard so every contribution can have a huge impact.

Accepted Concurrency Libraries
- Boost.Interprocess - Shared memory, memory mapped files, process-shared mutexes, condition variables, containers and allocators.
- Boost.Thread - Portable C++ multi-threading.
- Boost.MPI - Message Passing Interface library, for use in distributed-memory parallel application programming.

Accepted Math Libraries
- Boost.Graph - The BGL graph interface and graph components are generic, in the same sense as the the Standard Template Library (STL).
- Boost.Math - A wide selection of univariate statistical distributions and functions that operate on them.
- Boost.uBLAS - uBLAS provides matrix and vector classes as well as basic linear algebra routines. Several dense, packed and sparse storage schemes are supported.

Libraries in Development
- Libraries Under Construction - A list of libraries currently under development, many of which are concurrency and/or math related.
- Review Schedule - Gives you an overview of the development status of many of the libraries.