For creating quiz to be conducted on the computer, try Hot Potatoes at
http://web.uvic.ca/hrd/halfbaked/ which has app for creating muliple choice questions... Hot Potatoes is not freeware, but it is free of charge for those working for publicly-funded non-profit-making educational institutions, who make their pages available on the web.
For power point templates, just google for free powerpoint templates (
http://www.google.com/search?q=free+...oint+templates) and you find a lot of links...
Arun