Apache Tcl began life as an umbrella for projects related to the integration of the Apache web server and Tcl.
Apache Tcl is now open for any and all Tcl-based projects that are interested in community building, according to http://tcl.apache.org/static/about.html
Currently active and maintained projects are
Other projects (now dismissed) that have been subprojects of the larger Apache Tcl umbrella
More information at http://tcl.apache.org
Apache Tcl and the projects therein have their own wiki space now:
Comanche: the Comanche configuration tool is not part of the Apache Tcl effort, though it's an Apache related project.