Python Materials Genomics is a robust materials analysis code that defines core object representations for structures and molecules with support for many electronic structure codes. It is currently the core analysis code powering the Materials Project (https://www.materialsproject.org).
matminer is a library that contains tools for data mining in Materials Science
FireWorks workflow software
atomate has implementations of FireWorks workflows for Materials Science
Chronograph is a simple stopwatch / chronometer / chronograph for timing Python code.
pythonbase is a skeleton for creating Python projects