ATHENA and ARTEMIS: interactive graphical data analysis using IFEFFIT

We introduce a new software package for analysis of XAS data. This package is based on the IFEFFIT library of analytical and numerical algorithms and uses the perl/Tk graphics toolkit. The two main components are ATHENA, a program for XAS data processing, and ARTEMIS, a program for EXAFS data analysis using theoretical standards from FEFF. These programs provide high quality analytical capabilities in a manner that is accessible to novices yet powerful enough to meet the demands of an expert. The programs run on all major platforms and are freely available under the terms of a free software license.