| [asv](https://github.com/airspeed-velocity/asv) | Airspeed velocity (asv) is a tool for benchmarking Python packages over their lifetime. |
| [attrs](http://www.attrs.org/) | Classes Without Boilerplate |
| [backports_abc](https://pypi.python.org/pypi/backports_abc) | A backport of recent additions to the "collections.abc" module. |
| [bleach](https://pypi.python.org/pypi/bleach) | An easy safelist-based HTML-sanitizing tool. |
| [BoltzTraP2](https://www.imc.tuwien.ac.at/index.php?id=21094) | BoltzTraP2 is a modern implementation of the smoothed Fourier interpolation algorithm for electronic bands that formed the base of the original and widely used BoltzTraP code. |
| [certifi](https://pypi.python.org/pypi/certifi) | Python package for providing Mozillas CA Bundle. |
| [click](https://pypi.python.org/pypi/click) | A simple wrapper around optparse for powerful command line utilities. |