Miniconda, which is a smaller alternative to Anaconda that is just conda and its dependencies (as opposed to Anaconda, which is conda and a bunch of other packages like numpy, scipy, ipython notebook, etc.).
This site provides the “standard,” “normal,” “reference,” and “everyday” version of Python, as described above. The documentation for Python 2 and 3, both current and previous releases, are also available here, as well as many other Python resources.
Anaconda is a scientific Python distribution to get Python. It has a simple but powerful graphical installer, it adds different useful modules right out of the box, and it has a simple tool for selectively installing additional modules.
Anaconda is provided for free from Continuum Analytics, which also has commercial Python-related products.
Canopy Express is a free scientific Python distribution developed by Enthought.
Python(x, y) is a scientific Python distribution that features the Spyder IDE and the PyQt4 package for GUI programming.
WinPython is a free open-source portable distribution