U.S. Citizenship and Immigration Services website: offers information regarding Immigration Laws and procedures.
Online Forms: USCIS Downloadable forms are available on this website. Please note that you will not be able to file some of these forms via the Internet – you will have to print out the form and mail it to the appropriate USCIS office.
Department of State Visa Services: Department of State’s information web pages about visas, e.g. Waiver of the J Visa Two-Year Foreign Residence Requirement, Visitor Visa Application, Visitor and Student Visas, Employment Visas, Validating Visas in the U.S. and more.