Open source or free financial analysis programs/libraries

Question

I'm looking for something containing similar functions to Matlab’s financial and financial derivatives toolbox but don’t have the cash to spend on matlab. I would appreciate any info on free or open source libraries or programs that will let me easily calculate interest rates, risk etc.

Answer 1

How about JQuantLib or QuantLib?

Answer 2

How about the Octave financial functions?

http://www.gnu.org/software/octave/doc/interpreter/Financial-Functions.html#Financial-Functions

I'm not familiar with the Matlab toolbox, so you'll have to judge for yourself.

GNU Octave is a high-level language, primarily intended for numerical computations. It provides a convenient command line interface for solving linear and nonlinear problems numerically, and for performing other numerical experiments using a language that is mostly compatible with Matlab. It may also be used as a batch-oriented language.