Osmose is a tool to prepare multimedia presentations. It has been tested under Mac OS X (Panther and Tiger), Linux, and Windows XP with Java 1.4.2. It allows you to print the presentations and to visualize them on the screen and on the Web in HTML (under Mac OS X, it is also easy to create PDF files from your presentations). Osmose is based on a research work that proposes a new way to create digital documents. Rather than WYSIWYG, it is a more complete way of working that articulates working on the content, adding multimedia files, and working on the style using a graphic theme.