This page provides downloads of 32- and 64-bit Windows binaries of many open-source extension packages for the CPython implementation of the Python programming language.

The files are unofficial (meaning: informal, unrecognized, personal, unsupported) and made available for testing and evaluation purposes only. Consider using the Python(x,y), ActiveState, or Enthought distributions if you are new to Python or need support.

[Editorial note: not too many astronomers use Windows, but if you do you are in luck, this page is amazing!  If only there were analogs for Linux and Mac.]