Dear Osman,

Here are some useful links concerning

open source code available for text feature extraction:

For textual features

(1)

The R Project for Statistical Computing ( http://www.r-project.org/ )

offers some of the simpler feature extraction techniques (e.g. principal component analysis) via built-in commands.

More specific algorithms are often available as publicly available scripts or third-party add-ons.

(2)

http://lightsidelabs.com/what/research/

(3)

http://www.predictiveanalyticstoday.com/top-11-free-software-for-text-analysistext-mining-text-analytics/

(4) For audio features

http://yaafe.sourceforge.net/\

(5) 

If you have an access to at least one the following common numerical programming environments, e.g., MATLAB, SciLab, NumPy

then you can have an access to several simpler feature extraction techniques.

Best regards,

Yaakov

Thank you very much

Try this,

General Architecture for Text Engineering (GATE),

open source software capable of solving almost any text processing problem

this is the site link:

https://gate.ac.uk/

and this is the wiki link:

http://en.wikipedia.org/wiki/General_Architecture_for_Text_Engineering