Sorry M8, not my native language. All off the head tracking solutions from above are supposedly using the NP code, but NP has no problem with it.
Some off those HT are supposed to be around longer than NP track ir. If that is true, how come they are using NP code if NP wasn't around when they wrote their code. Hence, NP stole from them.
If I speculate, just for fun-The creators of freetrack are laid off employees from NP. That's why the feud between them.
