ArchiCAD’s rendering engine is Lightworks and, although it comes with some internal material libraries, it’s always nice to have more. Lightworks has therefore set up a website where users can download additional libraries - most of them free. Look for those that have “Base functionality” or “Architectural functionality” - the others may not work.

Go to :: http://www.lightworks-user.com/downloads.php  via: virtual building solutions

• 2008.02.01 : Barebones ArchiCAD
• 2007.06.29 : Lakhs and Crores in a spreadsheet
• 2007.02.16 : Sketchup plugin for AC 10
• 2007.10.04 : Tiny PDF
• 2005.01.05 : Another link for OttoPDF
• 2006.05.22 : Free downloads from Accustudio