Edward Tufte, of “The Visual Display of Quantative Information” series of books, hosts a discussion board, (at times quite technical) about displaying scientific information, with specific comments by users as well as E.T. about specific packages. A multi-year discussion of graphing software, including software that is free, open source, or very low cost had some recent entries.
This is an area that NGOs need to learn more about. Not only do NGOs need to be able to articulate the outcomes of their work, they need to be able to do it in a way that is easily understandable by funders and the public.