Have you heard about Chemists Without Borders?
They are an organization founded in 2004 by Bego Gerber and Steve Chambreau as a result of a letter ("An Ailing Cure") that Bego sent to the editor of Chemical and Engineering News in September 2004.
Members of Chemists Without Borders share their interest to solve humanitarian problems by mobilizing the resources and expertise of the global chemistry community and its networks.
If you want to know more about their work, visit their website or facebook page.