+1 for WinPython. WinPython has indeed been created by a core developer of PythonXY, using his experience from PythonXY [1]. Key advantages: (A) Portable vers

+1 for WinPython. WinPython has indeed been created by a core developer of PythonXY, using his experience from PythonXY [1]. Key advantages: (A) Portable version allowing indefinite number of side-by-side installations, (B) Both 32-bit and 64-bit versions are available for both Python 2 and 3. Downsides: Windows-only [1] http://sourceforge.net/p/winpython/wiki/Roadmap/ http://sourceforge.net/p/winpython/wiki/Roadmap/