pandas is a Python library for doing data analysis. It's really fast and lets you do exploratory work incredibly quickly. Here's a great cookbook by Julia Evans that's full of instructive recipes for performing common tasks. Highly recommended.
Awesome curated collection of IPython and Jupyter Notebooks. There's a lot to explore here... neural nets, pandas, python for data mining, D3 for MatPlotlib, etc, etc, etc. Highly recommended.
The title says "Abridged" but there's a lot of good stuff here. This is a well-linked collection of software, research, and talks for a variety of machine learning topics, such as Deep Learning, Computer Vision, Natural Language Processing, Visualization, GPU Learning, and Optimization.