www.thesimsresource.com A huge site for all things Sims
www.simfreaks.com/blueprint/faredit.html Tool to extract all Sim related files from the game data (including meshes and skins)
www.clothmenagerie.thesimsresource.com Custom costumes and skins
Other TheSims related tools
:www.simfreaks.com/blueprint The TheSims object editor
www.simfreaks.com/blueprint/faredit.html Tool to extract all Sim related files from the game data
http://simstoolbox.terrashare.com/index.htm All sorts of editing information
www.winzip.com The essential compression routine
www.swissquake.ch/chumbalum-soft/ms3d/index.html Shareware 3D editor (currently $20 to register)