Homepage http://www.atdor.com/
The ATDOR program is actively developed by Roalt Aalmoes since 1998 and is a 100% pure Tcl application to administer track & field (athletics) competitions.
It features international support, although it is mainly used in the Netherlands.
The program is licensed under the Open Source GPL license.
For international audience: The program features an db.tcl 100% pure tcl database manager ADB/ADBSQL that makes it easy to create a (relational) database in Tcl.
Interesting. Site in English, any time soon?