I am a big fan of the Subversion source control system, and so here are some things I've coded to help out with migrating to and using Subversion.
Unless otherwise stated, all of the code on this page is licensed under the GNU GPL v2.
Visual SourceSafe to Subversion Export Script
This script exports data from a VSS database into a Subversion repository. It will attempt to 'atomise' VSS checkins if possible, and will export VSS labels into Subversion branches. I hope others will find it as useful as I have, although I make no guarantees that it will work on anyone's system other than mine :)
NautilusSvn v0.11
This project is now hosted on Google Code - http://code.google.com/p/nautilussvn/ .
NautilusSvn v0.11-1 .deb file
Here is an experimental Debian package which should be suitable for use on any Debian-derived distro (such as the wonderful Ubuntu).