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/about.rvt
More information at http://tcl.apache.org
Apache Tcl and the projects therein have their own wiki space now:
http://wiki.apache.org/tcl/FrontPage