World Bank's Open Data (External site)
Includes databases provided by World Bank and other agencies such as FAO, IEA, ILO, IMF, ITU, OECD, UN, UNIDO, and WEO.
The Open Data Initiative has over 2,000 indicators for over 200 countries, some going back 50 years. Available in English, Spanish, French, and Arabic.
Free and open access to global development data. Includes both time series (macro) and survey (micro) data on a wide range of topics of interest to development practitioners. Provides basic analytical tools and secure access to both including their meta-information.