AsyncArt
The AsyncArt Project is comprised by a set of Open-Source HDL libraries and examples targeted to the efficient implementation of Globally Asynchronous, Locally Synchronous (GALS) design architectures over Commercial-Off-The-Shelf FPGA devices.
More than a standard library, the core of the AsyncArt project is a collection of very simple reference design examples that contain useful tricks and methodologies that can be easily extended to more complex projects.