Maxima -- GPL CAS based on DOE-MACSYMA

OpenMaLi   (Compare Project)

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Mostly written in Java

License: BSD-3-Clause

Math::Symbolic   (Compare Project)

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Mostly written in Perl

License: Artistic-2.0, GPL1, GPL-2.0+

GNU Octave   (Compare Project)

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Mostly written in C++

License: GPL-3.0+

igraph library   (Compare Project)

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License: GPL-2.0+

KAlgebra   (Compare Project)

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Mostly written in C++

License: GPL-2.0+

Functy   (Compare Project)

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License: Unknown

Gravit   (Compare Project)

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Mostly written in C

License: LGPL

xmds   (Compare Project)

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Mostly written in C++

License: GPL-2.0+

graph-tool   (Compare Project)

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Mostly written in C++

License: GPL-3.0

wxMaxima   (Compare Project)

Low Activity

Mostly written in C++

License: Unknown

TeXmacs   (Compare Project)

High Activity

Mostly written in C++

License: GPL-2.0+

PARI/GP   (Compare Project)

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Mostly written in C

License: GPL-2.0+

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License: GPL-2.0+

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License: GPL-3.0+

fftw   (Compare Project)

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Scilab   (Compare Project)

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Mostly written in C

License: CECILL-2.0

yasm   (Compare Project)

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Mostly written in Assembly

License: BSD-2-Clause-FreeBSD, BSD-3-Clause, GPL-2.0+

array   (Compare Project)

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Mostly written in Matlab

License: BSD-3-Clause

gnuplot   (Compare Project)

High Activity

Mostly written in C

License: Unknown