Portable Python - Minimum bare bones portable python distribution with PyScripter as development environment.
Microsoft Visual Studio - Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft.
WinPython - The easiest way to run Python, Spyder with SciPy and friends out of the box on any Windows PC...
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
Anaconda - Anaconda is the leading open data science platform powered by Python.
Xcode - Xcode is Apple’s powerful integrated development environment for creating great apps for Mac, iPhone, and iPad. Xcode 4 includes the Xcode IDE, instruments, iOS Simulator, and the latest Mac OS X and iOS SDKs.