Other User Groups

The Informix-Clubhouse - The Benelux Informix User Group
Guide Share Europe - The premier IBM User Group in Europe
IDUG Europe - European DB2 Users Group

General Information

IBM Informix Homepage
IBM Information Management
DB2 LUW - Information Center
IBM for z/OS - Information Center
Infosphere Information Integration

Forums & Support

IBM Informix Knowledge Center
DB2 Express Forum
DB2 LUW - Forum
Optim LUW Forum
Cognos 8 BI Support site

Best practices

DB2 LUW - Best practices for DB2