Ancestry (freely accessible in Wandsworth Libraries) - popular family history website.
Free Births, Marriages and Deaths Index transcription of the General Register Office Index of Birth, Marriage and Death, which gives the year and quarter and the district of registration. Work in progress.
Free Census returns - transcriptions of Census returns. Work in progress.
International Genealogical Index - includes the 1881 census and many parish register entries.
BBC Family History - contains How To guides.
Scotland's People - the General Register Office Scotland site. Pay-as-you-go.
The National Archives - contains catalogues for material at the National Archives, research guides and many other useful search tools.
London Metropolitan Archives - includes information on records relating to the Borough of Wandsworth held by the London Metropolitan Archives.
Parliamentary Archives - archives of the UK Parliament.
Archive catalogues online
Access2Archives - online catalogues for England.
Scottish Archives Network - online catalogues for Scotland.
AIM25 - collection level descriptions of archives held in the London area.
Archives Hub - collection level descriptions of archives held by UK universities.
Other useful sites
Wandsworth Museum - information on the new Museum.
Thames Pilot: Battersea - Images of Battersea and the Thames
Thames Pilot: Wandsworth - Images of Wandsworth and the Thames
British Pathe Film Archive (news footage, 1896 - 1970).
Historical Directories - online versions of trade directories, including Kelly's.
Workhouses website including information on the Wandsworth and Clapham Union Workhouse.