Interactive XAFS analysis program

 IFEFFIT is an interactive program for XAFS analysis. It combines the
 high-quality analysis algorithms of AUTOBK and FEFFIT with graphical display
 of XAFS data and general data manipulation.
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 IFEFFIT comes as a command-line program, but the underlying functionality is
 available as a programming library. The IFEFFIT library can be used from C,
 Fortran, Tcl, and Perl.