Self Organizing Map (SOM) Implementation

Question

I'm looking for a C, C++ or Java based SOM implementation with licensing applicable for commercial use (non-zero cost is okay).

So far I'm aware that there exists SOM_PAK (from Kohonen), but the licensing forbids commercial use.

Is anyone aware of alternative implementations?

Answer 1

How about this, it's BSD licensed.

http://knnl.sourceforge.net/

Answer 2

There is a C# version here: MPerfect.