SAGE is a computer algebra system. SAGE combines the following mathematics software into one package: GAP, GNU Multi-Precision Library, GNU Scientific Library, Matplotlib, Maxima, Mwrank, NetworkX, NTL, Numerical Python, PARI, and Singular. SAGE comes with both a command line interface and a graphical interface called the SAGE Notebook.
SAGE: Software for Algebra and Geometry Experimentation. SAGE is a computer algebra system specializing in arithmetic geometry, number theory, algebra, and modular forms. Based on python, SAGE also makes heavy use of routines written in C.