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
Happy Ada Lovelace Day — women who have contributed to the Sage community

Links

Codenode — Browser based interface to Python and 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. See this page for some tips on using Cantor.
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KASH/KANT — A free closed-source computer algebra system (superseded by Magma).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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