Software for computing fractal dimension:

Fractal Dimension Calculator is a Macintosh program which uses the box-counting method to compute the fractal dimension of planar graphical objects.

http://wuarchive.wustl.edu/edu/math/software/mac/fractals/FDC/
http://wuarchive.wustl.edu/packages/architec/Fractals/FDC2D.sea.hqx
http://wuarchive.wustl.edu/packages/architec/Fractals/FDC3D.sea.hqx

FD3: estimates capacity, information, and correlation dimension from a list of points. It computes log cell sizes, counts, log counts, log of Shannon statistics based on counts, log of correlations based on counts, two-point estimates of the dimensions at all scales examined, and over-all least-square estimates of the dimensions.

ftp://inls.ucsd.edu/pub/cal-state-stan
for an enhanced Grassberger-Procaccia algorithm for correlation dimension.

A MS-DOS version of FP3 is available by request to gentry@altair.csustan.edu.