I have packed the icons of the game foldes and upload to OpenGameArt to free download.
I use Adobe Fireworks to make the iconos, the source PNGs have layers, vector lines, gradients, etc, and only can be edited with Adobe Fireworks (sorry).
OpenSourceArt: http://opengameart.org/content/magic-and-mechanic-gamee-interface-icons
Jose Zanni blog: http://josezanni.com/iconos-de-la-interfaz-del-glest-para-descargar
Source PNGs: http://josezanni.com/resources/upload/link/410/icon-sources.7z
