While we don't currently wish to open-source our products, we try to open-source some of the tools and apps that we have developed internally. All of these open-source projects are copyrighted and are not public domain, but the Artistic License they are distributed under is, we think, quite reasonable. We hope people will find these projects to be interesting and useful.
We also have some sample code snippets that we have released to the public domain, since they are small enough not to be worth worrying about copyright and licensing issues.
Finally, we've got a few Mac / Cocoa jokes for your amusement!
We use SourceForge to host the source code of our open-source projects. SourceForge is a centralized collection of source code, and handles many issues (such as running the CVS repository) for us. If you intend to submit changes to our projects, please join SourceForge, request to be added to the development team for the project, check out a clone from CVS, make your changes, and commit them back in. Please contact us if you have any questions about how you might contribute to our projects.