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?