This library offers an alternative parallel programming API to that provided by the parallel package. The Par monad allows the simple description of parallel computations, and can be used to add parallelism to pure Haskell code. The basic API is straightforward: the monad supports forking and simple communication in terms of IVar s. The library comes with an efficient work-stealing implementation, but the internals are also exposed so that you can build your own scheduler if necessary. Examples of use can be found in the examples/ directory of the source package.