The RAM-Verlag publishing house offers differnt kinds of software especially for linguists

General Software
ALTMANN-Fitter Iterative Fitting of Univariate Discrete Probability Distributions to Frequency Data
Software for Linguists
QUITA Quantitative Index Text Analyzer (free Software download)
Excercises in Programming Languages
Perl Quantitative Linguistics Computing with Perl
Foxpro Data Processing and Managemant for Quantitative Linguists with Foxpro