SAGE

URL: http://modular.ucsd.edu/sage
Contact: wstein@ucsd.edu

SAGE is free and open software that supports research and teaching in algebra, geometry, number theory, cryptography, etc. SAGE includes the following software: GAP, Maxima, Singular, PARI, MWRANK, NTL, Numeric, Python, IPython

Citation:

@artcle{SAGE,
  key          = "SAGE",
  author = "William Stein and David Joyner",
  title        = "{SAGE: System for Algebra and Geometry Experimentation}",
  year         = 2005,
  volume = 39,
  number =2,
  journal = "Communications in Computer Algebra",
  }