RETScreen is the world's leading clean energy decision-making software. Made available free-of-charge by the Government of Canada. RETScreen breaks down barriers to the development of clean energy, allowing decision makers and professionals to determine if a proposed clean energy project makes financial sense, and thus expanding the market for clean energy. RETScreen is used by more than 230,000 people in 222 countries and territories, and by over 210 colleges and universities worldwide. The software is available in 35 languages and has led to large user savings of over $4 billion as of 2009.