Linux Device Driver Development Kit (DDK)

I was looking for device driver samples, but I couldn't find any suitable sample on which I can experiment on. Moreover I always knew Linux doesn't have any Device Driver Development Kit (DDK). But the wait is over.

There is a DDK, in fact it is available since May 2006. Here is the announcement of the author.
And here is the DOWNLOAD link.

According to the author,

It is a cd image that contains everything that a Linux device driver author would need in order to create Linux drivers, including a full copy of the O'Reilly book, "Linux Device Drivers, third edition" and pre-built copies of all of the in-kernel docbook documentation for easy browsing. It even has a copy of the Linux source code that you can directly build external kernel modules against.