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The Cactus Code - http://www.cactuscode.org/
A modular manageable high-performance 3D tool for Numerical Relativity. |
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Form Symbolic Manipulation System - http://www.nikhef.nl/~form/
A free software package for manipulating tensors (abstract index notation) and other multi-component objects; highly suitable for calculations in general relativity and related theories such as supergravity. Documentation, course material, and possibilities for download. |
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http://www.math.washington.edu/~lee/Ricci/ - http://www.math.washington.edu/~lee/Ricci/
A Mathematica package for doing tensor calculations in differential geometry and general relativity. |
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GRTensorII - http://grtensor.org/
A computer algebra package for performing differential geometry calculations. Demonstrations of the package's applications to general relativity. |
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CarpetCode - http://www.carpetcode.org/
A mesh refinement driver for the Cactus code; the primary application is the simulation of black hole spacetimes. |