The svnmailer is a tool that is usually called by a subversion hook to submit commit notifications in various ways (at the moment: mail via SMTP or a pipe to a sendmail like program, news via NNTP, or CIA live tracker notification via XML-RPC). It is derived from the original mailer.py distributed with subversion, but should be much more consistent, more extensible, and have many more features.
Insurrection is a Web interface and RSS and Atom feed generator for Subversion that uses modern browser features while being as browser agnostic as possible. It has some repository rights administration features and a reasonably good-looking interface that can be customized. RSS and Atom feeds of updates to the project are available.
Parabuild is a software build and release management system. It helps software teams and organizations reduce risks of project failures by providing practically unbreakable scheduled, release builds and Continuous Integration. It supports Perforce, Subversion, CVS, Surround SCM, AccuRev, ClearCase, Serena ChangeMan (PVCS), Borland StarTeam, SourceGear Vault, Visual SourceSafe, and MKS Source Integrity.
SVNKit is a pure Java Subversion (SVN) client library. This means that users of the library (i.e. Java applications) do not have to include svn native binaries or javahl bindings to work with subversion repositories. It is not only a 100% Java replacement for javahl bindings, but also a library that provides a high level of control over subversion repository operations.
FishEye opens your source code repository to help you understand your code and keep tabs on the people who write it. It lets you view user activity, track code changes, and search and navigate through your repository from any Web browser. Nearly everything in your repository has its own URL, down to every single line of code for every revision. Files, branches, repositories, projects, and even people have their own activity stream. FishEye provides easy navigation, powerful search, historical reporting, configurable file annotation and diff views, changeset analysis, RSS feeds, and integration with JIRA, Crucible, Bamboo, Eclipse, and IntelliJ IDEA. FishEye works with Subversion, CVS, Perforce, Git or Mercurial.