There are many lists of the 110 livery companies of the City of London, and their nearly 40 livery halls, but the recommended Livery Companies Database gives comprehensive contact information about them all (kept up-dated by their individual clerks) and may be viewed alphabetically, by precedent, or by hall.
At the same database, nearly 100 City institutions and organisations are listed at Clubs & Guilds, with contact information, including at Guildhall, Mansion House and the Old Bailey, as well as various City guilds, clubs, ward clubs and past master associations (PMA’s). Also included are a number of trade/business related bodies, military units, and places available for venue hire. A selection of merchants and guilds from outside London are listded.
List of Masters Pocket Guide
Picture Books of Masters and Mistresses (spouses, consorts)
Historic lists of past lord mayors, sheriffs, and aldermen, together with current Court of Aldermen are grouped in
Churches - a list of City Churches with the livery companies that regularly worship in them.
City Churches - complete list of City churches, with links.
Mottos of all the livery companies
Military Affiliations. This site is maintained by the Reserve Forces and Cadets Association (RFCA) NOT by the Livery Committee.
Provincial Guilds of Great Britain, Ireland and the USA - a link to the list of “guilds oiutwith” the City of London, maintained at http://www.cityandlivery.co.uk
ROLLCO - The Records of London's Livery Companies Online