SymPy
Summary
SymPy is a Python library for symbolic mathematics. It aims to become a full-featured computer algebra system (CAS) while keeping the code as simple as possible in order to be comprehensible and easily extensible. SymPy is written entirely in Python and does not require any external libraries.
Authors
Ondřej Čertík (and many contributors)
Status
incomplete information or not officially approved by the authors