Nuitka is a Python compiler compatible with Python 2.6, 2.7, 3.2, 3.3, 3.4, and 3.5.
Right now Nuitka is a good replacement for the Python interpreter and compiles every construct that CPython 2.6, 2.7, 3.2, 3.3, 3.4, and 3.5 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.
It is somewhat faster than CPython already, but currently it doesn't make all the optimizations possible, but a 258% factor on pystone is a good start (number is from version 0.3.11).
Future
In the future, Nuitka will be able to use type inference and guessing by doing whole program analysis and then applying the results to perform as many calculations as possible. It will do this - where possible - without accessing "libpython" but in C++ with its native data types.
It will also be possible to integrate "ctypes" based bindings without the normal speed penalty (the compiled program will call the C++ library in C++ directly).
