Sage specific

Planet Sage Blogs — compilation of blogs by Sage developers
Sage Wiki — helps to organize the development, formulate ideas and collect information
Sage in the News — collection of articles about Sage

Links

Codenode — Browser based interface to Python and Sage.
Cantor — A KDE-integrated worksheet interface to various mathematical applications, including Sage.
Sphinx — Sage uses Sphinx to generate beautiful Python code documentations.
Wikipedia: Sage CAS
Python — primary programming language, both the interface and underlying infrastructure
Cython — used by Sage to interface with C/C++ libraries and to write easy maintainable compiled C code extensions for computation intensive parts
Mercurial — version control system used by Sage

The Axiom Wiki, FriCAS, and OpenAxiom
Cantor — an application that lets you use your favorite mathematical applications from within a nice KDE-integrated Worksheet Interface.
Macaulay 2 – High-quality algebraic geometry software under active development
Java3d
OpenOpt – Integrates solvers for numerical optimization into a single common Python-based framework.
KASH/KANT – A free closed-source computer algebra system (superseded by Magma).
Magma – Commercial closed-source software aimed at pure research mathematics and cryptography; the fastest software in the world at many computations.
HECKE – William Stein wrote this program in C++ in 1999 for computing with modular forms.
NTW – The number theory web site has a list of number theory software.
NZMATH – Number theory software written in pure Python.

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