Chilli Source
DDS-Lite - database design studio, enhanced entity relationship diagram, data structure diagram, data definition language (ddl) scripts, reverse engineering, supports all major databases, cross dbms target compatibility, project manager, integrated tools, java source code, template language, sql editors, user defined types, unlimited email support
http://www.chillisource.com/products/index.html

Database Design Guide
Before you set up a new database, usually you spend a lot of time at the white board. Here are some basic tips. Most probably these Dos and Don'ts of database design will reduce your efforts and help you to gain a clean database design. The examples refer to Progress® databases, but you’ll get the idea, even when you use another database system.
http://www.smart-it-consulting.com/database/progress-database-design-guide/

Embarcadero Technologies
Advanced software tools for application developers & database professionals. Cross-platform solutions for database design, development & management.
http://www.embarcadero.co.uk

Database Solutions for Microsoft Access
Database Solutions and Downloads for Microsoft Access. Database design and implementation tutorials, articles, tips, tricks, code samples, Microsoft Access Help and FAQ's, downloadable database and data model samples and examples.
http://www.databasedev.co.uk/

Blue Claw Database Design
Microsoft Access programmers offer custom database design & support. Also offered: Hourly programmer training; free programming examples; downloadable tutorials; for-sale Access database templates.
http://www.blueclaw-db.com/

ADB-Krafter AB
ADB-Krafter är en fullserviceleverantör av IT-tjänster. Tele +46(08)445 2670
http://www.adbk.se

DATAbased Design & Decisions, Inc.
Creators of tDBD (tool for database design) that generates generic database schema based on the genetic signature of a business.
http://www.databasetemplate.com/

Database Design Software
DbWrench is multi vendor, multi platform database design and synchronization software
http://www.dbwrench.com

Database Design 2000
Primary focus is on database design and implementation for beginners.
http://www.database-design-2000.com/

Lasch, Robert--Designs Are Us
Web site design and maintenance and database development solutions from DESIGNS ARE US.
http://www.designsareus.com/