+ Fastest Fourier Transform in the West. Currently, this library is the
+ only FFT routines used by CTSim.
+
+wxWindows (http://www.wxwindows.org)
+ Used by CTSim (src/*) graphic front-end. Platform independent for
+ GTK, Motif, and Windows32 API's. Requires version 2.3.x.
+
+ctn (http://www.erl.wustl.edu/DICOM/ctn.html)
+ Used by CTSim for DICOM file import and export