SciPy
SciPy is an open source library of scientific tools for Python, sponsored by Enthought. Eric Jones, Enthought's CEO, and Travis Oliphant, Enthought's president, were two of the original authors of SciPy, which is now supported by a thriving community of users and developers. SciPy supplements the popular NumPy module, gathering a variety of high level science and engineering modules together as a single package. It includes modules for optimization, integration, special functions, signal and image processing, genetic algorithms, and ODE solvers.
SciPy is also the name of a conference on scientific computing in Python that is sponsored by Enthought and others. From 2001 to 2009 it was co-sponsored by the Center for Advanced Computing Research and held each year at Cal Tech. It is now held at rotating locations in the U.S. (e.g. Austin, TX in 2010) and is supplemented by separate conferences in Europe and India.


