2013 World Development Materials 9.3.2013 | World Development, Here you can download the various resources and background materials for the 2013 World Development Appeal including artwork for the poster and leaflet, PowerPoint presentation and video clips. Videos World Development Appeal 2013 : Transforming Lives. Water & Hygiene: World Development Appeal 2013. Unity & Reconciliation: World Development Appeal 2013. Church & Community: World Development Appeal 2013.