This is one of the projects out of Jonathan Aldrich's (http://www.cs.cmu.edu/~aldrich/) group at CMU ...
"The Penrose team is based at Carnegie Mellon University, comprising Katherine Ye, Nimo Ni, Dor Ma'ayan, Max Krieger, Rain Du, Josh Sunshine, Jonathan Aldrich, and Keenan Crane. (Emeritus: Jenna Wise and Lily Shellhammer.)"