Evaluation of open-source numerical analysis tools
An interesting paper (in Spanish) called “Evaluation of open-source tools for numerical calculation” compares and comments the four main software available nowadays.
The authors compare the well know commercial tool Matlab with Octave, Scilab and Scipy. The main conclusion is that Matlab (2.59 points) is the best tool, followed by Octave (2.52). Not bad for something you don’t have to pay for! You can download the paper here.