BoondocksNet.com -- A very extensive site on anti-imperialism, including the Philippine-American War. Contains an astounding collection of pictures, documents, articles, and primary sources.
The History Guy: Philippine American War -- A brief description of the Philippine American war.
The Philippine-American War (1899-1902) from Filipino-Americans.com -- A nice summary, lots of information, and from a Filipino perspective for a change.
The Philippine American War: Fighting a New Conqueror -- A good source for original text of treaties, proclamations, and other documents.
The Spanish American War -- Provides information about the Spanish American War, which led to the Philippine conflict. Also includes information on the Philippines.
The Swish of the Kris -- A reprint of an old textbook on Moro history.
The Philippine History Group -- A group interested in the history of the Philippines, their webpage offers many articles about the war.
Search Engines of the Philippines -- A collection of search engines of the Philippines, a great starting place for information. Links lead to government, geography, culture, history, business, entertainment, general information, etc.