I found the use of two colours on this poster attention grabbing. It has all the important details on and it and one main focus.
charity: water poster is short, sweet, to the point - and makes a hard hitting impact about the company's purpose.
Hits the nail on the head Such a simple idea with a very #powerful message.
Pierre Bernard poster for a French anti-poverty charity
Social/Political Posters - Graphis
Viva con Agua #Charity #Bottle Poster | http://www.gutewerbung.net/viva-con-agua-charity-bottle-poster/ #Advertising
Kids Charity Flyer Design Template - Miscellaneous Events Flyer Design Template PSD. Download here: https://graphicriver.net/item/kids-charity-flyer/19341815?ref=yinkira
Crisis Charity Poster