The FamilySearch website is a free website containing a large database of records from all over the world. Contained in the database is Ancestral File, US 1880, UK 1881 and Canadian 1881 census returns, International Genealogical Index (IGI), Pedigree Resource File, Social Security Death Index, Vital Records Index and many documents to help in research efforts. Recently they added Vermont Vital records from 1760-1908! FamilySearch has many different parts that may help you in your quest:
familysearch - The main website for searching records and digital images from over 100 countries.
familysearch wiki - An online encycolpedia that helps you find research information or share your knowledge.
Give back to familysearch - Join over 100,000 volunteers online to index billions of genealogical records worldwide. Completed indexes are published online for free.
Family History Archive at BYU - FamilySearch is working with select libraries to digitize and publish online personal, local and county histories.