http://tango.freedesktop.org/Tango_Icon_Library (public domain)
  * view-refresh.png
  * edit-paste.png
  * go-next.png
  * folder-saved-search.png
  * process-stop.png
  * address-book-new.png
  * edit-find.png
  * edit-clear.png
  * document-save.png
  * document-open.png
  * preferences-desktop.png
  * emblem-important.png
  * system-log-out.png

http://www.feedicons.com/ (license?)
  * feed-icon-14x14.png
