This page provides information about the location of Tcllib.
The official home is the Sourceforge project http://sourceforge.net/projects/tcllib/ . It provides the CVS repository used by the Tcllib developers, mailings lists, bug trackers, and official releases.
The main website for the Tcl/Tk comunity has a page for Tcllib as well, this is http://www.tcl.tk/software/tcllib/ .
Additionally, ftp://www.tcl.tk/pub/tcl/nightly-cvs/ is a source for snapshots of the library.
Tcllib (and everything it contains) is also included as a part of the ActiveTcl Batteries Included distribution as well as other distributions, such as kitten.
Documentation for each module is available at http://tcllib.sourceforge.net/doc/index.html (Official location), and also at http://aspn.activestate.com/ASPN/Tcl/Reference/ (ActiveTcl Online Reference).
The aforementioned Sourceforge project is also the official home for other efforts, namely: