occam-π ( occam-pi ) is a concurrent programming language using the process-oriented programming model, which aims to make it straightforward to write correct, expressive concurrent programs. occam-π is supported on a variety of platforms by a collection of open source tools, and is used and maintained by a community of developers around the world.
If you're new to occam-π, the Learning Resources page should probably be your first port of call.
The OccamDoc pages are an online reference to the occam-π standard libraries, generated automatically from the source code.