SVNBackup allows you to make full and incremental backups of your Subversion repositories without interrupting user activity. It provides functionality not available through "svnadmin hotcopy". It can also be used to migrate between different versions of subversion and different db backends.
iF.SVNAdmin is a Web based GUI to your Subversion authorization file. The application doesn't need a database back end or anything similar, since it is completely based on the Subversion authorization- and user authentication file. It includes LDAP support for users and groups. It is also possible to create and delete repositories. A small repository browser for easier access-path creation is also included.
repos-tools is a set of command-line utilities to make work on your code repositories faster and easier. It lets you push, pull, build, and do other things on your repositories all at once. The supported (D)VCSes are Git, Subersion, Bazaar, and Mercurial. For GitHub users, forking, following, watching, and dealing with issues can be done from the shell.