z3reload is a Zope 3 product that enables automatic reloading of view code. See README.txt for more information.
Version 0.1 released on 2005-08-20. Grab a tarball. It's a bit stale now.
The source of z3reload is stored in the Zope 3 Base Subversion repository. Use this command to retrieve the latest version:
svn checkout http://codespeak.net/svn/z3/z3reload/trunk z3reload
You can also browse the source code online.