"Transparency International, the global civil society organisation leading the fight against corruption, brings people together in a powerful worldwide coalition to end the devastating impact of corruption on men, women and children around the world. TI's mission is to create change towards a world free of corruption." The site provides useful information and reports. The Tools section includes an interesting section on Corruption Measurement, which includes their annual Corruption Perceptions Index which "ranks more than 150 countries in terms of perceived levels of corruption, as determined by expert assessments and opinion surveys," Bribe Payers Index, which evaluates "the supply side of corruption - the propensity of firms from industrialised countries to bribe abroad," and the Global Corruption Barometer, "a survey that assesses general public attitudes toward and experience of corruption in dozens of countries around the world." The Policy and Research section also includes many useful tools and information. Some of the data is available as zip XML files from the site.