+fftw (http://www.fftw.org)
+ 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
+ UNIX and Windows
+
+g2 (http://g2.sourceforge.net)
+ Currently, used partially by SGP (Simple Graphics Package) for
+ graphical display by command-line tools (tools/*). This library
+ will likely be deprecated in favor of wxWindows.
+