The best Programming Language alternative to Graph is R (programming language), which is both free and Open Source. If that doesn't work for you, our users have ranked more than 25 alternatives to Graph, but unfortunately only two of them are Programming Languages.
R is a free software environment for statistical computing and graphics. It is a GNU project which is similar to the S language and environment which was developed at Bell Laboratories (formerly AT&T, now Lucent Technologies) by John Chambers and colleagues. R can be consider.
Open source framework for numerical computations and advanced statistical analysis, featuring nonlinear curve fitting, ODE solving, 1D/2D publication-quality visualization, Fourier and wavelet transforms, intuitive syntax, and namespace-based code organization for research.
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