Government

Tuvalu - Central Statistics Division - Provides economic, social and environmental statistics, including data on tourism and on industrial sectors.
http://www.spc.int/prism/Country/TV/Stats/

The Constitution of Tuvalu - Full text of the constitution of Tuvalu, from the University of the South Pacific.
http://www.tuvaluislands.com/const_tuvalu.htm

World Statesmen - Tuvalu - Review of the country's history, politics, leaders and international organizations and treaties. Includes map, constitution, national anthem and pictures of historical flags.
http://www.worldstatesmen.org/Tuvalu.html

IFES - Election Guide: Tuvalu - Includes government overview, elections, news and links.
http://www.electionguide.org/country.php?ID=221

CIA - Chiefs of State and Cabinet Members of Foreign Governments: Tuvalu - List of government officials and their titles, updated weekly. Also includes the head of the central bank, ambassadors to the United States and Permanent Representatives to the UN, New York.
https://www.cia.gov/library/publications/world-leaders-1/world-leaders-t/tuvalu.html

US Law Library of Congress - Tuvalu - Annotated compendium of online sources providing access to primary documents, legal commentary and general government information about specific jurisdictions and topics.
http://www.loc.gov/law/help/guide/nations/tuvalu.html

World Legal Information Institute - Tuvalu - Catalog and search facilities for over 500 databases from 55 countries including case-law, legislation, treaties, law reform reports, law journals, and other materials.
http://www.worldlii.org/catalog/2137.html