I needed a sine wave pattern, or an easy way to generate them, for a generic file at work the other day. I used to do this kind of thing in Excel, but it was pretty easy to just make a little program in Flex Builder, which compiles to Flash, to do the same thing. It's just some buttons and a text field. I added the plot later, it was pretty simple too.

Play with the numbers a little and click the Generate, or just click the Generate button. Useful for me, probably not many others.