Portable Python - Minimum bare bones portable python distribution with PyScripter as development environment.
GraphPad Prism - Overview. GraphPad Prism, available for both Windows and Mac computers, combines scientific graphing, comprehensive curve fitting (nonlinear regression), understandable statistics, and data organization.
WinPython - The easiest way to run Python, Spyder with SciPy and friends out of the box on any Windows PC...
OriginLab - OriginLab is a data analysis tool that provide the engineers and scientist with the technical charts and system for 2D and 3D plotting and all kind of fitting including curve and peak fitting.
Anaconda - Anaconda is the leading open data science platform powered by Python.
SciDaVis - SciDAVis is a free application for Scientific Data Analysis and Visualization.