WebSVN offers a view onto your subversion repositories that's been designed to reflect the Subversion methodology. You can view the log of any file or directory and see a list of all the files changed, added or deleted in any given revision. You can also view compare two versions of a file so as to see exactly what was changed in a particular revision.
Since it's written using PHP, WebSVN is very portable and easy to install.
WebSVN has a new website!
For more information about WebSVN visit www.websvn.info.
The latest release of WebSVN is version 2.3.3 (from 2011-06-27). (download)
You can also access the WebSVN subversion repository. The 'tags' folder contains the official releases of WebSVN. 'trunk' contains the development version - use at your own risk.
You can access the repository here: http://websvn.tigris.org/svn/websvn/
You should browse the repository using the "Subversion" link on the left of this window in order to locate the lastest stable release in the tags folder.
The guest username is "guest", there is no password.