Bricklink www.bricklink.com

BrickLink.com is a premium venue for individuals and businesses from all around the world to buy and sell new, used and vintage LEGO® through fixed price and auction services.
Brikwars www.brikwars.com

BrikWars is the plastic-brick wargaming system that throws the peaceful worlds of your favorite construction toys into wanton chaos and destruction!
LEGO® User Group Network www.lugnet.com

International LEGO® Users Group Network (LUGNET™), global community of LEGO® enthusiasts. LUGNET unites LEGO® fans worldwide through forums, web pages, and services.
Brickshelf www.brickshelf.com

Brickshelf is an online LEGO® photo gallery for fans to display what they have created.
New England LEGO® Users Group www.nelug.org

The New England LEGO® Users Group (NELUG™) was formed for the sole purpose of facilitating adults in the sharing of the LEGO® hobby. NELUG's primary goal is camaraderie that is achieved by providing members the opportunity to meet other adults who share a common fascination of LEGO® through correspondence, meetings and events.