International Architectural Database and Information Retrieval System for Architecture

Baudoc (Swiss Site) 
Extensive construction sourcebook

Bauhandwerk (Swiss Site) 
Company directory of the Swiss construction industry (German Site) 
Materials, Glossary, Manufacturers Index

BauNetz (German Site) 
Directory of Construction Services and Materials

Building Team     
Community site for architects, engineers, owners, contractors, manufacturers

AutoCAD software for handheld PCs and PocketPCs

The Fridge     
Architectural Science Software – very nice and most of them free of charge

Herman Miller     
Manufacturer of the fine chair that you see in virtually all pro studios…

(German Site) Floorings, Carpeting

(Dutch Site) Work Environment Rules and Regulations (“Arbo”)