Rainer Sieber CAE Systems
- Voltool is a supplementary product (IUA) for easier and faster work in surface design and topology handling with CATIA V4.
- http://voltool.caesystems.com/

Catia V5 Users Group
- Mailing list dedicated to helping users with the Catia family of work benches.
- http://groups.yahoo.com/group/catiav5/

Catiaworld.com
- An independent resource for CATIA and other CAD/CAM software by Dassault. Offers business listings for engineering, hardware, software, and recruitment, with more information for registered users.
- http://www.catiaworld.com/

CADAM Drafting
- Information about the 2d drafting solution within the CATIA product family from Dassault Systems.
- http://www.cadam.com/

Practical Catia
- Catia training and job listings involving CATIA CAD/CAM/CAE skills.
- http://www.practicalcatia.com/

IBM Engineering Solutions / CATIA
- CATIA is marketed worldwide by IBM.
- http://www.catia.ibm.com/catmain.html

CATIA IUA Functions by EMA
- Customization and extension functions for CATIA, with free download of some examples.
- http://www.ema3.com/

CATIA Operators Exchange
- COE is dedicated to the exchange of information about CATIA and other Dassault Systèmes software products.
- http://www.coe.org/