Here are some interesting hyperlinks to succulent-related sites that I find interesting. It is not intended to be complete, but if it's here, I have at least been once into contact with them. If you feel your or another site should be added to my list, please contact me about it, I'll have a look.

Personal Homepages
Francoise & Christian Prudhon (France)
Francois Hoes (Belgium)
Hugo De Cock (Belgium)
Derek Tribble's homepage (UK)
Breck Breckenbridge's Gasteria ref collection(USA)
Useful Nurseries
Cok Grootscholten
     largest Haworthia, Gasteria, Adromischus selection I know of in Europe (Holland)

     Ernst Specks: rare succulents (Germany)

Izimakana Succulent plants
     previously Melvin nursery: Vincent De Vries (South Africa)
Gariep plants (South Africa)
Silverhill Seeds (South Africa)
Some Belgian & Dutch societies
Succulenta Brabant
Succulenta Nederland
Cactus & Succulent Plant Mall
South African Succulent Society
     issue the splendid but erratic journal 'Aloe'

The Haworthia society
The Mesemb Study Group
The Cactus and Succulent Society of America