http://hylang.org/
Literally everywhere.
Hy Society
A dialect of Lisp that's embedded in Python
hylang
Hy mode for Emacs
The Hy Transformer
IRC bot for Hy
A utility library for Hy
hy appengine repl
Vim files and plugins for Hy
Infinitesimal Quest 2 + ε: A turn-based puzzling dungeon crawler