Solutions:related to the standard internpreter/virtual machine
pyc is a compiler for python. Python has its own compiler that produces bytecode (.pyc) from .py files. This compiler does exactly the same, the only difference is the resulting files are a smaller (but 100% compatible with the standard python interpreter).
psyco - c just in time compiler that will make your python programs run faster with no change in the source code
Solutions:related to other platforms
IronPython - a new Python implementation targeting the .NET and Mono platforms