It's called The Archery Program Click on that and it will take you to the website.

The guy that designed it actually hangs out at Archery Talk. It is a program that lets you calculate speed, trajectory, find the correct spine for a certain set up and arrow and print off sight tapes. Probably does other stuff as well. I'm sure the web site will say. It is much more accurate than using an online calculater or simple arrow chart.

You can download a free trail version of it that has limited functions, this is what I use. It is kind of a pain because you have to start from the beginning every time, it doesn't save anything from what I can tell. And not everything works, like the sight tape function printable targets. I would assume the full version has a more up to date database as well. However it works really well for figuring trajectory and checking spine for your set up. That is pretty much all I wanted it for any way.

There are other programs out there that are simular, I can't remember the names off the top of my head though. You could probably search for "archery programs" or something to that effect and they would show up.

Paul