I was just looking at http://www.snappyxo.com and their site mentioned that they had the first planar linkage design software. I sent a contact form letting them know of their mistake and I got a really nice reply from the CEO that he knows they are not the first and will have their site changed. He even said he knew of my work!
Anyhow, if you have interest in their stuff, check them out. It’s the least you can do after he was so nice to me about the “first” claim.