The Organisation for Economic Co-operation and Development (OECD) publishes a yearly Factbook that "provides a global overview of today’s major economic, social and environmental indicators, in a range of user-friendly formats. More countries than ever are covered in greater detail, enabling direct comparisons for many indicators between OECD Members and Brazil, China, India, Indonesia, Russian Federation and South Africa."
The OECD has also introduced a mobile phone app. This free app allows you to study several countries and their economic development. Click HERE to read more.