The example makes use of jTab, a javascript-based library that allows you to easily render arbitrary guitar chord and tabulature (tab) notation on the web. Automatically. It works in most modern browsers that support javascript, CSS and scalable vector graphics (SVG).
Study carefully the CSS and XHTML code how it's done.
AptanaStudio
The industry leading web development environment that combines powerful authoring tools for HTML, CSS, and JavaScript.
TablEdit
A program for creating, editing, printing and listening to tablature and sheet music (standard notation) for guitar and other fretted, stringed instruments.
QwikChord
A simple tool to create chord diagrams that can be pasted into other applications, or saved as graphic files.
Inkscape
An Open Source vector graphics editor, with capabilities similar to Illustrator, CorelDraw, or Xara X, using the W3C standard Scalable Vector Graphics (SVG) file format.