Building Chords

In Chord Progression I showed a chart with some recommended chords depending on the root key in both degrees, minor and major.

A very common chord is built with the combination of the following triads.

But these chords, although very useful, do not satisfy me. I have been looking on the Internet for many others alterations that can be made in every chord. You can see a whole explanation about building chords in a Spanish web page called  "El rincón del guitarrista". Another interesting page is How Music Works.org
I have made a schematic chart with all this.

Finnaly I developed a program that helps to build chords progressions. See  GuitarChorder 1.1.

Man at improve English!