SAXS software sought

[Rick MacDonald]

I seek SAXS software.

Would some kind soul who is familiar with current methods
in small-angle x-ray scattering data analysis point me
toward software that implements "Moore's method" or some
other recipe for computing a radial distribution of
distances from solution scattering data?  What do SAXS
spectroscopists use?

In the absence of software, comments on the implementing the
transform (Intensity ---> spherically averaged density) 
would be much appreciated.

Rick