Coming from Germany, Burning Board exists since 2001 and could be defined as a really powerful commercial alternative to other classic forum softwares... Burning Board is edited by the WoltLab company, and counts more than 100,000 active installations.
You can consult the Woltlab Burning Board Review here.
An updated version has been installed as well to let you test and discover this software via the Woltlab Burning Board Live Demonstration.
You can consult it here :