Highgate Vampire Society - London-based organisation, founded by occult researcher David Farrant.
Hydrographic Society - Representing and serving the world hydrographic surveying community.
Incorporated Society of Musicians (ISM) - Professional association for all musicians in the UK, providing a complete backup service for professional performers, composers and teachers.
Institute for Citizenship - Aiming to promote informed, active citizenship and greater participation in democracy and society.
Institute for Social Inventions - Non-profit organisation supporting imaginative and feasible ideas for improving the quality of life. Ideas can be submitted to the Global Ideas Bank online.
Institute of Contemporary British History - Organise conferences and seminars, as well as publish books and journals about 20th century post-war British history.
Institute of Race Relations (IRR) - Conducts research and analysis regarding the struggle for racial justice at local and international levels.
Jersey Society in London - For people interested in Jersey, Channel Islands. Publishes magazine, editor Brian Read, lists recent Jersey books.
Jewish Blind & Disabled - Independent charity providing support and sheltered housing for visually and physically disabled people in Greater London.
Kingston Racial Equality Council - Based in Kingston-upon-Thames (London) - multi-racial, multi-cultural organisation co-ordinating the focus on racial harassment and racial justice.
Leopold Residents Association - Making The Leopold Estate a decent place to live - situated in Inner London.
Lewisham Young Women's Resource Project - Lewisham - teen-run site includes information about peer pressure, peer training, and other services and issues.
Liberal Democrat History Group - For the study of the history of UK Liberal Democrats, Liberals and Social Democrats - newsletter, meetings, publications, help with research.
Library Association - Includes the on- line version of the Library Association record magazine.
Linnean Society of London - Promotes all aspects of biology, but particularly those concerning the diversity and interrelationships of organisms.
London Athenians Speakers Club - Learn to speak in a relaxed and friendly environment with the UK's largest Toastmasters Club.