OSXReformer.org

Reformer is, or will hopefully be, an application for customizing the Mac OS X Installer, and by customize I mean that it will provide a very easy way to add and remove packages to the OS X Installer, allowing you to have software installed during the Mac OS X Setup, saving you lots of time and annoyance. It will be released for Linux and Mac OS X, the Linux version will require Mono. Contrary to the below Pre-Alpha screenshot, it will not be released anytime soon if ever for Windows, due to lack of an open source HFS+ mounting library, the Linux version is being developed on Windows.

Pre-Alpha Reformer (For Linux)