Translations of names: languages, scripts, countries and regions, currencies, eras, months, weekdays, day periods, timezones, cities, and time units
Language & script information: characters used; plural cases; gender of lists; capitalization; rules for sorting & searching; writing direction; transliteration rules; rules for spelling out numbers; rules for segmenting text into graphemes, words, and sentences
Country information: language usage, currency information, calendar preference and week conventions, and telephone codes
Other: ISO & BCP 47 code support (cross mappings, etc.), keyboard layouts
http://cldr.unicode.org/
http://cldr.unicode.org/index/downloads
From the page CLDR includes: