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

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:

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

SARBayes runs a CVSTrac+wiki for SORAL (SARBayes optimal resource allocation library)

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

pfSense seems to be the most up-to-date public CVSTrac deployment, often running CVS and/or not yet commited code.