svncommit_hook.php was written to address the numerous problems with the commit_email.pl script which is bundled with subversion. Email messages sent by this script are sent as multipart messages with each diff in its own part. All of the parts are sent as nicely formatted HTML. It is possible to specify the charset of the files in the repository (the default is still UTF-8). Diffs are displayed only for the modified files. Diffs are colored. PHP files are validated with "php -l". It is possible to specify the URL of a corresponding Trac-resource, and the links to the files will be automatically included in the email.
SVNBot is a program written in PHP that constantly runs in the background (or foreground, if desired) and monitors your SVN repository (or part of it). When it notices the repository has changed, it notifies everyone on its jabber contact list providing a quick overview of what has been changed (in a format similar to the 'svn log -v' command).