MasterPiets

made by gabriellesc, submitted by wesleyac
MasterPiets is a very polished IDE and debugger for a very silly programming language. I appreciate the detailed attention to UX for such an esoteric language!

Efficient Private Contact Search

made by filippo, gtank, submitted by wesleyac
An explanation of some of the difficulties in private information retrieval, along with an interesting scheme to make using bloom filters more tenable.