United States Citizenship & Immigration Services (USCIS)
United States Immigration & Customs Enforcement (ICE)
United States Customs & Border Protection (CBP)
United States Department of State (DOS), Visa Bulletin, Visa Appointment Wait Times, Country-Specific Medical Exam Information, Find US Embassies.
United States Department of Labor (DOL), Online Wage Library, Legal Authorities, Foreign Labor Application Gateway.
Immigrant Defense Project – Community Resources