A site detailing the London Tube Map, with its many Underground Tube Stations and details on the various tube lines with passenger numbers and more.
The site also features a live version of the London Tube Map (not done by me) showing the location of all tube stations, approximate path of tube lines and an estimation of the tube trains currently in service, although this is still in beta and can show some unpredictable results.
Visitors can download the London Tube Map in various formats - PDF, JPG and so on.
Based around the work of Matthew Somerville at
http://traintimes.org.uk:81/map/tube/.