Findmypast - World Records

The commercial site Findmypast has a vast collection of world records. These include:
• UK BMD Records - A large online collection of UK parish records, 1.5+ million records
• US Marriage Records - These span 360 years with 450+ million names
• Irish Parish Records - A large collection of Irish records with 300+ million names
• 1939 register for England and Wales with 41+ million records
• Census Records - England, Wales and Channel Islands (1841 to 1911); Scotland 1841-1901 plus collections for Ireland, Canada and United States
• Travel Records - These include migration records and passengers lists
• England & Wales Crime Records - A collection of UK crime & punishment records 1779-1936
• British & Irish Newspapers - A large collection of searchable historic British and Irish newspapers
• World Military Records -  A comprehensive online Naval collection, Royal Air Force collection and British Army service records, 100+ Million
There is a free name search with various payment options available to access transcripts and/or the digitised original records.
TIP: Ancestry.com and Findmypast are available for free, onsite, at some state, public and family history libraries. Check what is available near you.