Recopilaciones de PSDs y brushes para Photoshop (y GIMP) de señales de avisos y alertas.
PSD red and yellow warning signs
Descargar: www.psdgraphics.com/icons/psd-red-and-yellow-warning-signs
Anti-Theft Card PSD Resource por allhopeislost
Descargar: allhopeislost.deviantart.com/art/Anti-Theft-Card-PSD-Resource-76297260
Free Warning PSD Buttons por Grafon
Descargar: grafon.deviantart.com/art/Free-Warning-PSD-Buttons-84892188
53 Warning Signs Brushes por furiouscheese
Descargar: 
furiouscheese.deviantart.com/art/53-Warning-Signs-Brushes-59053151
Pictogram warnings – Vol.1 por bashcorpo
Descargar: bashcorpo.deviantart.com/art/Pictogram-warnings-Vol-1-15104250