1) FeedCreator class v1.7.2 [LGPL]
originally (c) Kai Blankenhorn
www.bitfolge.de

2) Nuvola Icons [LPGL]
David Vignoni
ICON KING - www.icon-king.com

3) Shtudown Button Icon [LPGL]
Krdan_Ielalir
Crystal Clear icon by Everaldo Coelho and YellowIcon.
http://commons.wikimedia.org/wiki/Image:Crystal_Clear_action_exit.svg

4) Free PSD Icons
Ganato
http://www.ganato.com

5) Public Domain Icons
http://www.wpclipart.com/
http://www.openclipart.org/