Armament Technology - Provides links to coverage of topics including missiles, weapons, ammunition, rockets, warplanes, military aviation, simulation, tutorials, propulsion systems and electronic warfare
Armor in Action - Original 'in action' photos of tanks and armored vehicles operating worldwide. Also includes selection of naval and aircraft shots.
ArmsWorld (EnemyForces) - Information on modern military armament and equipment, including photos and detailed descriptions.
Chinese Defense Today - Chinese People's Liberation Army and its weapon equipment, organizations, and space program.
CNN.com Specials - Photos and brief characteristics of aircraft, munitions, ground weapons, warships, and weapons of mass destruction as related to the U.S.-Iraq war.
Defense Update - Bi-monthly magazine covering modern defense and technology, with articles and reviews on new products and programs.
Ironsides - Fan site about the equipment and weapons used by the armed forces of the US, UK, Canada, and Australia, with links to agencies and other related sites.
Military Factory - Reference site detailing specification on military weapons from World War II to the modern era.
Military.cz - Includes information about U.S., British and Russian weapons, aircraft, ships, tanks, fighters, and military technology. Also has photos and videos.
Pictures News: Chinese Military Forces - Pictures of China's military forces including warships, submarines, aircraft, missiles, tanks, and other equipment.
Secret Weapon - Offers information about weapons of modern war. Lists new and future weapons that are coming to the battle field.
Ships of the World (English Edition) - Japanese monthly magazine covering warships, merchant vessels, ship building, maritime events, and history.
Trackpads Military Gallery - A military community site featuring a large gallery with photos of land vehicles, aircraft, ships, submarines.
Wikipedia: Weapons - Encyclopedia article. History of weapons through the ages.