This project has moved to github you can find the OTP Base code here

The OTP Base is a build environment that supports the OTP way of building applications with the Erlang programming language. The reason to use OTP Base is that it makes creating OTP applications very simple. You no longer have to wade through docs trying to figure out what a .script file is for. OTP Base provides the following core tree structure which corresponds to the Erlang OTP design principles.

OTP Base is an Erlware project

Check out the slightly grainy but still educational OTP Base screen cast