octave uses some of the best and most respected numerical libraries as balgen, dassl, eispack, fftpack, lapack, linpack, minpack, odepack, ranlib, slatec-fn and villad. octave can be dynamically extended with user-supplied c++ files.

Great matlab alternative. Just beware that not all scripts created with Matlab if that is what you are using it for.

i agree with m4daredsun. octave is a nice matlab-clone, almost (!) as good as the original. however, python + matplotlib + spyder is an open source concept that in many aspects already outruns matlab.

Not bad but I prefer [python + numpy + scipy + matplotlib] for scientific/technical computing and data processing

es muy funcional y liviano, buena opcion para evitar trabajar con el pesado matlab