That means, Traktor does not have to be running to use this application, it works directly with the Traktor standalone editor.
KontrolDJ.NET it's the only midi translator that works directly with Traktor. Another thing about it is that it's free to use, that means you don't need to pay for it. Personally I made a donation for the development of it.
The keyboard mode will work with most midi keyboards, there's 50e0806aeb gilana