Mac users interested in Open sankore generally download:
Open Sankore - The free, open-source interactive digital teaching software.
In addition to commenting, drawing, and highlighting, the Open-Sankoré program gives you the option of enriching your course content by importing flash animations, images, audio, videos, or by including existing .pdf or .ppt documents.
A comprehensive office suite that includes a word processor, spreadsheet, presentations, and drawing tool. It is designed to be fully compatible with other popular office suites. The Document Foundation manages the development and upkeep of this software, which is a fork of OpenOffice.org. Download various language versions to meet your specific needs.