If the ARM platform has a spare 400 megabytes of disk space and at least 256 megabytes of memory, the option is to download the free OpenOffice.org suite. The suite includes the Impress presentation software that can open and edit PowerPoint files (
www.openoffice.org/product/impress.html). The software is already included in the Ubuntu distribution of Linux, but can be downloaded for other Linux distributions at download.openoffice.org.