bvhacker started life in November 2006 as a bvh file conversion tool for Second Life animation. Since then it has evolved into a quick loading tool ideally suited for preparing animation files for Second Life.
If you do sell animations made with bvhacker you have an obligation to obtain permission from the original bvh motion file creator to re-sell their work. However, this does not apply to files from Animazoo - if you want to re-sell animations their animations you are permitted to do so as long as you add the word 'Animazoo' to the name of the animation when you put it up for sale.