Cinpy is a Python library that allows you to implement functions with C in Python modules. Inlined C code is compiled with tcc (Tiny C Compiler) at runtime. The results are made callable in Python with ctypes library.
Cython is a language that makes writing C extensions for the Python language as easy as Python itself. Cython is based on the well-known Pyrex, but supports more cutting edge functionality and optimizations.
Instant is a Python module that allows for instant inlining of C and C++ code in Python. It is a small Python module built on top of SWIG and Distutils.