Emigrants from Scotland to America, 1774-1775
Irish Immigrants: New York Port Arrival Records, 1846-1851 over 600,000 entries: includes Surname, Given Name, Age, Gender, Literacy, Native Country, Residence, Destination, Transit Type, Compartment, Port of Embarkation, Ship, Number of Passengers on the ship, Arrival Date, and Occupation
Immigrant Ships Transcribers Guild one of the largest colllection of ships lists on the net, indexed and cross referenced
Index to Mennonite Immigrants on United States Passenger Lists 1872-1904 indexed by surname and by ship
Immigrant Passenger Arrivals at the Port of New York Vol 1-6 by Immimgrant Ships Transcribers Guild
Irish Passenger Lists 1803-1854 (over100 ships passenger lists mostly with New York  as destination)
Mayflower Passenger Index
Passenger Lists and Emigrant Ships- From Norway Norway passenger list site, many for arrivals in the US
Ships Passenger Lists on the Internet a review of websites containing links to over 4,200 passenger lists complete with passengers names from 1700s to 1890s.
Ship Arrivals of German immigrants in US ports indexed by ship