Maps of London

• Boroughs with Web Links
• London Postcode Map
• Grubstreet list of postal districts
• Tube Map
• The Greater London Bus Map
• Streetmap - (This is not just of London but of the UK. It is useful for providing URL links for locations and is included here for completeness.)
• Yahoo! Maps is the same sort of thing but goes into much more detail.

Social/Cultural/Etc.

• Outdoor Running Tracks

Historical

In chronological order:

• Roman London
• John Speed's 1611 Map of London (and Panorama)
• John Speed's 1611 Map of Westminster
• Johann Baptist Homann Prospect and Map of London (c. 1705)
• Greenwood's Map of London 1827
• John Snow's London in 1859
• Historical Statistical Maps
• Charles Dickens' London
• Charles Booth's 1889 Descriptive Map of London Poverty

Spanning various years:

• Interactive Historical Maps at the Perseus Digital Library

Other

• The Crown Estate
• House Price Changes
• Japanese Maps
• Landscape Design Sites in London