:uhh: ... not sure if this is the right place to post this. Hi, I'm looking for something like GSL but with programs instead of routines. For example, there is a method that was developed in the 80's for solving the time-dependent Schrödinger Equation (M. D. Feit, J. A. Fleck Jr. and A. Steiger. J. Comput. Phys. 47, 412 (1982)). This paper has something like 1200 citations, so I'm sure many people have programmed it before. Is there any place where I can found this kind of programs? Thanks!