You can get a copy of the source code that runs the Living Internet site, released under a free open source software license, along with a user manual that describes how to use the code as a template to build your own web site, on the source code page.
The first page of each chapter's design section describes how to obtain the software for that technology, collected below for convenient access:
The Mozilla project maintains four open-source Internet applications -- Firefox web browser, Thunderbird email program with integrated newsgroup reader, Sunbird calendar application, and Chatzilla IRC client, and is highly recommended as a primary source of software for your Internet toolbox.
The simple ping software, built-in to most operating systems, is one of the most useful utilities for testing your Internet connection.
Some related tips and information are provided on the downloading software page.