Just ran across a link that shows that Oracle (who used to use TCL for regression testing, not sure these days) is distributing a TCL-based data warehouse scripting package - on windows no less!
Title of the paper is "Oracle Warehouse Builder 10g
Embed Oracle Warehouse Builder in your applications using scripting" at the following link.
http://www.oracle.com/technology/products/warehouse/pdf/OWB_Scripting_Paper.pdf
A general search for Oracle metabase TCL would turn up more.