The free online SSWM Toolbox is a new educational software application that can answer (almost) all questions on the topic of sustainable water and wastewater management. It incorporates all aspects of the water cycle, and shows the links to the nutrient cycle. Human activity is central to these interconnections. The SSWM Toolbox was designed under the direction of seecon for a multitude of users, especially those in developing countries. In addition to planning and implementation methods, the constantly updated toolbox offers technical and behaviour-changing solutions to aid local level development of sanitation and water management that is more environmentally sustainable. In 2011, the SSWM Toolbox received the International Water Association’s (IWA) Project Innovation Award for software in the “Sanitation and Wastewater” category.