Out of the Blue Presentation Template
Great inspiration for a possible infographic. I like the flow of the information and the shapes the negative space make.
Hydra - Creative Powerpoint Template. Download here: https://graphicriver.net/item/hydra-creative-powerpoint-template/17113213?ref=ksioks
Carrots PowerPoint templates is a free PowerPoint PPT background slide design
Multi Trends PowerPoint Presentation Template
Designing ppt in ps
While I'm not a particular fan of PPT, this design –– "5 Infographics to Teach You How to Easily Create Infographics in PowerPoint" –– has a great, attention-grabbing look.
PPT Template Designed by Simon. Download：http://www.pptstore.net/shangwu_ppt/7037.html
Victa Powerpoint by Design District, via Behance
Saving the world, one slideshow at a time :) -Cool Keynote Presentation-