In another question someone pointed out, that at least some slavic languages use word order to express the grammatical category of definitiveness.
For instance in Polish:
This example has been flagged by some as incorrect, but my expertise is too limited to evaluate
maly pies a small dog
pies maly the small dog
Do you know futher examples of languages with free word order, highly flectional languages like Balto-Slavic, Ancient Greek or Sanskrit or agglutinative languages like Korean and Japanese with a free word order except for the predicate or others that use word order to convey some additional meaning?