Weka2c is a project mainly written in C++ and PYTHON, it's free.
Conversion of text syntax weka classifier trees into c style if statements
A very simple tool for converting text-syntax weka trees into c++ if-else statements.
Supports string/double variable and return types currently. Tested on REP/J48 trees.
Next up rule based learner support.
Usage: python weka2c.py
Generates "C-version" as filename+".cpp"