The desired software must be similar if possible to the commercial code entitled : Phonon.
Dear Kebbab,
I tink you can add Phonopy package to wien2k code for investigation of Phonon properties of materials.
Please check this site.
http://phonopy.sourceforge.net/
Dear collegue,
There is PHON package with a WIEN2K-interface (wien2phon):
link to PHON program: http://www.homepages.ucl.ac.uk/~ucfbdxa/phon/
link to WIEN2PHON interface: http://www.wien2k.at/reg_user/unsupported/
good luck
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