SVNKit is an Open Source pure Java Subversion library.

VisualSVN is a Microsoft Visual Studio Plugin for seamless integration with Subversion.

ZigVersion is a Subversion client application for Mac OS X, designed around the typical workflows of professional programmers.

Commercial web-based subversion browser that lets you manage your subversion repositories and permissions. Screen-shots, tour, and online demo.

VisualSVN Server is a package that contains everything you need to install, configure and manage Subversion server for your team on the Windows platform. It includes Subversion, Apache and a management console.

A community help and discussion forum for exchanging information and tips with other users.

Powerful, cross-platform Subversion client. All required tools (File Compare, Conflict Solver, Subversion- and SSH-client) are included. Free Foundation version, commercial Professional version.

A cross-platform GUI client for Subversion. (Commercial)

An article by Ben Collins-Sussman that tries to dispel some irrational misconceptions about Subversion.

A lightweight web-interface for a remote Subversion repository. Not unlike the default mod_dav_svn HTML interface, but with some improvements.