The U.S. Department of State has just released the 2009 edition of Treaties in Force. It lists all bilateral and mulitlateral treaties to which the United States is a party that were in force as of January 2009. Section 1 lists bilateral treaties and other agreements, organized by country. Section 2 lists multilateral treaties and other agreements, organized by subject. A downloadable PDF of the publication is available for free on the State Department’s website.