Tsunami is an open-source high performance computing language. With it you can write streaming data-parallel algorithms that utilize GPGPUs for orders-of-magnitude speed-up with the ease of writing sequential algorithms.
A sub-C cross compiler for EduMIPS64 simulator. EduXcomp is a java project built using the antlr tool, and a grammar written by Monty Zukowski hardly modified by Elena Carobene, Massimo Trubia, and Alessio Tognazzolo.