The BYU Center for Family History and Genealogy has a free, searchable collection called the Immigrant Ancestors Project. 

“The Immigrant Ancestors Project, sponsored by the Center for Family History and Genealogy at Brigham Young University, uses emigration registers to locate information about the birthplaces of immigrants in their native countries, which is not found in the port registers and naturalization documents in the destination countries. Volunteers working with scholars and researchers at Brigham Young University are creating a database of millions of immigrants based on these emigration registers.”

You can do general searches and search by language, or you can search by the archive, or you can search with advanced settings.