Source
Nuitka is a Python compiler.
It's fully compatible with Python 2.6, 2.7, 3.2 and 3.3.
You feed it your Python app, it does a lot of clever things, and spits out an executable or extension module.
Free license (Apache)
Right now Nuitka is a good replacement for the Python interpreter and compiles every construct that CPython 2.6, 2.7, 3.2 and 3.3 offer.
It translates the Python into a C++ program that then uses "libpython" to execute in the same way as CPython does, in a very compatible way.