Alongside to hardcore numerical computation, there are python tools for data analysis, statistics and cognitive sciences that worth to be presented as well.
IPython could also be included as the in-line and notebook modes are of a great help for scientists.
Add some package tools for statistical computing
Add IPython as tool for reproducible science
Add Pandas and Rpy2 as relevant tool for those interested in statistics
Add scientific/neuroscience tools
PsychoPy a library for cognitive science