The Intel® SPMD Program Compiler (ispc) is currently being developed by Dmitry Babokin and James Brodman at Intel. It was started with by Matt Pharr, Ingo Wald, and Jean-Luc Duprat. It draws from a number of language features pioneered in Ingo Wald's IVL compiler as well as parsing code written by Geoff Berry and Tim Foley.
Thanks also to the additional contributors: Alex Reece, Andreas Wendleder, Andrey Guskov, Anton Mitrokhin, Ben Harper, Daniel Schubert, Evghenii Gaburov, Gabe Weisz, John Poole, Lu Guanqun, Mark Lacey, Michael Liao, Nipunn Koorapati, Peng Tu, Pete Couperus, Pierre-Antoine Lacaze and Vsevolod Livinskij!
ispc is developed "in the open" on github; contributions and improvements are always welcome.