CVSTrac is selfhosting.  The same server also hosts the following
projects:

*: SQLite: http://cvs.hwaci.com:2080/sqlite/.
   (See also http://www.hwaci.com/sw/sqlite/)
*: The Tk HTML widget: http://cvs.hwaci.com:2080/tkhtml/.

A google search turns up
http://tux4kids.carrolltoncityschools.net/cgi-bin/cvstrac/tux4kids/
and https://links.math.rpi.edu/links/.

Ralf S. Engelschall is running the popular Open Source software
projects *OpenPKG*, *OSSP* and *OpenSSL* off of CVSTrac at:

*: http://cvs.openpkg.org/
*: http://cvs.ossp.org/
*: http://cvs.openssl.org/

The {quote: CompSci} sysadmins at Adelaide University, South Australia, are
using
CVSTrac (internally) for keeping track of issues and documenting systems and
procedures.

{link: http://sarbayes.org/ SARBayes} runs a CVSTrac+wiki for
{link: http://sarbayes.org/cgi-bin/run-cvstrac.cgi/SORAL/index SORAL}
(SARBayes optimal resource allocation library)

The {link: http://www.datamining.monash.edu.au Monash Data Mining Centre} or
{link: http://www.csse.monash.edu.au Monash Computer Science & Software
Engineering} host several projects on CVSTrac:

*: {link: http://www.datamining.monash.edu.au/cgi-bin/cgiwrap/mdmc/run-cvstrac.cgi/oldcamml/index CaMML} (MML-based learning of causal models}
*: {link: http://www.datamining.monash.edu.au/cgi-bin/cgiwrap/mdmc/run-cvstrac.cgi/snob-vanilla/index Snob-Vanilla} (MML-based clustering)
*: {link: http://www.datamining.monash.edu.au/cgi-bin/cgiwrap/mdmc/run-cvstrac.cgi/mltools/index MLtools} (Machine learning add-ons for Weka)
*: {link: http://www.datamining.monash.edu.au/cgi-bin/cgiwrap/mdmc/run-cvstrac.cgi/causal/index Causal Reckoner} (Bayes net viewer with interventions)
*: Several projects use it internally for project management (to-do lists,
bugs) as well as a handy CVS browser and Wiki.

{link: http://cvstrac.pfsense.com/ pfSense} seems to be the most up-to-date
public CVSTrac deployment, often running CVS and/or not yet commited code.