External programs used by XCrySDen:

• babel: interconverts a number of file formats currently used in molecular modeling.
   
• convert (ImageMagick): interconverts a number of graphics file formats
   
• whirlgif: animated GIF encoder
   
• mpeg_encode: MPEG encoder
   

Utilities:

• xsfConvert: converts the output of different ab initio codes into the XCrySDen's XSF format.

See also:

• Scientific codes provided by Democritos