Is there an Open Sourced Beer Brewing Application?

Sleepy asks : "Are there any open source beer brewing applications available? There are a couple of commercial apps available for Windows, and one for the MacOS, but I haven't found anything which includes the source. I am teaching myself Java programming and would love to learn on a "real" program. I have a "healthy" interest in brewing so this is an especially interesting app. If there is no such thing, yet, would anyone like to team up and write one? I'd prefer to use Java as it's what I'm already learning, and is fairly portable."