London Genealogy Databases Online

In preparation for the Alberta Genealogical Society conference in April I've taken a look at what databases are offered online for London by Ancestry, Deceased Online, FamilySearch, Findmypast, MyHeritage. It's easy to overlook existing resources as new ones come along.
The table below is a consolidated list, organized by number of records. Not included are more comprehensive databases, such as the censuses, that cover a larger area, some cemetery database from the National Archives where number of records is not available and, newspapers. I'm aware of some additional mostly smaller databases, please add specifics as a comment.

Title	Company	Records
London, England, Electoral Registers, 1832-1965	Ancestry	179,071,664
England, London Electoral Registers, 1847-1913	FamilySearch	17,760,894
London, England, Land Tax Records, 1692-1932	Ancestry	12,772,584
London, England, Workhouse Admission and Discharge Records, 1659-1930	Ancestry	10,198,397
London, England, Church of England Baptisms, Marriages and Burials, 1538-1812	Ancestry	8,844,994
London, England, Church of England Marriages and Banns, 1754-1921	Ancestry	7,549,807
London, England, Church of England Births and Baptisms, 1813-1906	Ancestry	6,240,093
London, England, Poor Law and Board of Guardian Records, 1430-1930	Ancestry	3,864,371
London, England, Church of England Deaths and Burials, 1813-1980	Ancestry	2,616,957
London, England, School Admissions and Discharges, 1840-1911	Ancestry	1,711,929
London Lives, Culture & Society 1680-1817	Findmypast	1,653,799
Greater London Burial Index	Findmypast	1,634,962
Web: London, England, Proceedings of the Old Bailey and Ordinary's Accounts Index, 1674-1913	Ancestry	1,246,537
London, England, Clandestine Marriage and Baptism Registers, 1667-1754	Ancestry	894,892
Middlesex, London, Old Bailey Court Records 1674-1913	Findmypast	786,726
London and Surrey, England, Marriage Bonds and Allegations, 1597-1921	Ancestry	750,614
London, Docklands and East End Baptisms, 1558-1933	Findmypast	668,310
Southwark Cemeteries	Deceased Online	600,000
Boyd's Inhabitants Of London & Family Units 1200-1946	Findmypast	583,158
London Apprenticeship Abstracts, 1442-1850	Findmypast	486,370
Camden Cemeteries	Deceased Online	470,400
London, England, Selected Poor Law Removal and Settlement Records, 1698-1930	Ancestry	469,314
London, England, Freedom of the City Admission Papers, 1681-1930	Ancestry	463,958
Manor Park Cemetery	Deceased Online	430,000
Islington Cemeteries	Deceased Online	425,700
Lewisham Cemeteries	Deceased Online	385,000
Greenwich Cemeteries	Deceased Online	371,000
London, England, Overseer Returns, 1863-1894	Ancestry	294,833
Kensal Green Cemetery	Deceased Online	257,500
London, England, Stock Exchange Membership Applications, 1802-1924	Ancestry	256,986
London, Bethlem Hospital Patient Admission Registers and Casebooks 1683-1932	Findmypast	247,517
Boyd's London Burials	Findmypast	242,635
Eltham Crematorium	Deceased Online	210,000
Brompton Cemetery	Deceased Online	205,000
London, England, Selected Rate Books, 1684-1907	Ancestry	186,366
Newham Cemeteries	Deceased Online	180,000
Highgate Cemetery	Deceased Online	166,000
London, England, Marriage Notices from The Times, 1982-2004	Ancestry	160,046
City Of London, Haberdashers, Apprentices and Freemen 1526-1933	Findmypast	136,468
London, England, Wills and Probate, 1507-1858	Ancestry	135,186
London, England, Extracted Church of England Parish Records	Ancestry	133,630
London, England, Non-conformist Registers, 1694-1921	Ancestry	120,699
Spa Fields Cemetery	Deceased Online	114,000
London, England, Births and Christening Notices from The Times, 1983-2003	Ancestry	107,315
Merton Cemeteries	Deceased Online	100,000
London, Docklands and East End Marriages, 1558-1859	Findmypast	92,250
Havering Cemeteries	Deceased Online	75,000
Bunhill Cemetery	Deceased Online	71,100
London Probate Index	Findmypast	62,820
Harrow Cemeteries	Deceased Online	58,700
London, England, Land Tax Valuations, 1910	Ancestry	44,374
Brent Cemeteries	Deceased Online	40,000
Surrey and City Of London Livery Company Association Oath Rolls, 1695/96	Findmypast	32,965
London, England, King's Bench and Fleet Prison Discharge Books and Prisoner Lists, 1734-1862	Ancestry	32,198
Surrey & South London Will Abstracts, 1470-1856	Findmypast	29,508
London, England, Marshalsea Prison Commitment and Discharge Books, 1811-1842	Ancestry	28,849
London, England, Crisp's Marriage Licence Index, 1713-1892	Ancestry	27,932
Sutton Cemeteries	Deceased Online	27,500
London, England, Church of England Confirmation Records, 1850-1921	Ancestry	26,329
London, Westminster Marylebone Census 1821 & 1831	Findmypast	22,522
London Poor Law Records, 1581-1899	Findmypast	22,344
London, Dulwich College Register 1619-1926	Findmypast	18,313
City Of London, Ironmongers, Apprentices and Freemen 1511-1923	Findmypast	17,822
London Churches, Christening and Baptismal Records	Ancestry	15,596
London, England, TS Exmouth Training Ship Records, 1876-1918	Ancestry	12,107
London County Council Record Of War Service 1914-1918	Findmypast	10,145
London School Registers	Ancestry	8,347
London, Watermen, List Of Free Watermen, 1827	Findmypast	5,448
London Churches, Burials and Deaths Records	Ancestry	5,289
London Volunteer Soldiers	Findmypast	5,271
City Of London, Gunmakers' Company Freedoms and Admissions, 1656-1936	Findmypast	5,187
London, Archdeaconry Court Of London Wills Index, 1700-1807	Findmypast	4,687
London, Court Of Husting Will Abstracts, 1258-1688	Findmypast	3,853
London Consistory Court Depositions Index, 1700-1713	Findmypast	3,104
London, England, Selected Church of England Parish Registers, 1558-1875	Ancestry	2,967
London, England, Gamekeepers' Licences, 1727-1839	Ancestry	2,578
London, Watermen, Admiralty Muster Of The Port Of London, 1628	Findmypast	2,393
London, Watermen's Petition For The King Charles I, 1648	Findmypast	2,026
London & Middlesex Will Abstracts, 1700-1704	Findmypast	1,982
London and Country Directory, 1811	Ancestry	1,655
London, Watermen, Birth Register Of Contracted Men, 1865-1921	Findmypast	1,494
London, England, Marriage Licences, 1521-1869	Ancestry	859
London Marriage Licences 1521 - 1869	MyHeritage	853
London Post Office Directory, 1829	Ancestry	730
London, Watermen In Royal Navy, 1803-1809	Findmypast	629
London, England: St. Botolph, Bishopsgate, Church of England Baptisms, 1628-1690	Ancestry	525
The London Diocese Book 1890	Ancestry	522
London Stock Exchange Memorial Roll 1914-1918	Findmypast	510
A calendar of the marriage licence allegations in the Registry of the Bishop of London : 1597 to 1700	Ancestry	481
British Army, Lloyds Of London Memorial Roll 1914-1919	Findmypast	432
University College School, London, Register 1831-1891	Ancestry	331
The Publications of the Harleian Society, the Parish Registers of St Mary Aldermary, London	Ancestry	296
The Dutch Church Registers, Austin Friars London 1571-1874.	Ancestry	276
Cripplegate Ward, London Aldermen, 1276-1900	Ancestry	270
Child Apprentices in America from Christ's Hospital, London, 1617-1778	Ancestry	162
The Religious Census of London	Ancestry	135