1881 Census UK - Free lists from the 1881 full UK census...

Census records for 1841 1851 1861 1871 1881 1891 1901 and the Vital Record Index...
http://www.censusuk.co.uk

Census for County Durham...

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http://freepages.genealogy.rootsweb.com/~durhamcensus

Sheffield Indexers...

The Sheffield Indexers website provides full online searchable index to 1841 Sheffield census & Parish records etc. Features personal database of members Sheffield interests....
http://www.sheff-indexers.thewholeshebang.org

suffolk 1841 Census Index...

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http://freepages.genealogy.rootsweb.com/~tiber/suffolk41ind.html