IPython - IPython is a command shell for interactive computing in multiple programming languages, originally developed for the Python programming language, that offers enhanced introspection, rich media, additional shell syntax, tab completion, and rich history.
GraphLab Create - GraphLab Create is a Python library, backed by a C++ engine, for quickly building large-scale, high-performance data products.
Pandas - Combined with the excellent IPython toolkit and other libraries, the environment for doing data analysis in Python excels in performance, productivity, and the ability to collaborate. pandas does not implement significant modeling functionality outside of linear and panel regression; for this, look to statsmodels and scikit-learn. More work is still needed to make Python a first class statistical modeling environment, but we are well on our way toward that goal.
Scikit-Learn - Scikit-Learn is a simple and efficient tool for data mining and data analysis. It is built on NumPy,SciPy, and mathplotlib. Scikit-Learn has the following features: Classification, Regression, Clustering, Dimensionality Reduction, Model Selection, Preprocessing