KH Coder is a free software for quantitative content analysis or text mining. It is also utilized for computational linguistics. You can analyze Catalan, Chinese (simplified), Dutch, English, French, German, Italian, Japanese, Korean, Portuguese, Russian, Slovenian and Spanish text with KH Coder.
On Windows: Download the *.exe file and run it to unzip. Then run "kh_coder.exe." On Mac OS X: Instructions here.