I am searching for a Delphi VCL ingredient that enables my clients to aesthetically produce a database, that's, tables, fields, indexes, etc. Something similar to this: http://www.devart.com/blogs/dbforge/?p=136#more-136, but available like a third-party aspect of be embedded into a credit card applicatoin. Are you aware of something similar to this? I am not searching for visual query contractors, but database design components.

You might start by considering ESS Model source code: ain model is really a free &lifier free UML desing and UML curing tool wich export model data to XMI-format. When your model produced, you might take it on after that and generate your SQL scripts.

Download : http://essmodel.cvs.sourceforge.net/viewvc/essmodel/essmodel/
Source Code : http://essmodel.cvs.sourceforge.net/viewvc/essmodel/essmodel/

Unsure, however the TDatabaseSchema component in Context Software's Database Extensions component set might be near to what you are searching for:

Context Database Extensions

Or you wantOrrequire to mix it using their finish-user "Database Designer" product, which may be registered because the component editor for TDatabaseSchema. ( Database Designer ) The writer would gladly clarify should you requested, I am sure.