DanCoulter

This is a very simple and straightforward plugin to let you automatically blog the commit messages from your public Subversion repository. For now, only one project is supported.
Currently, it requires that PHP have shell access to the “svn” command. This means that it has to run on a *nix server with subversion installed. If you’re not sure whether your server supports this, try typing “svn info” at your shell. If it says that it cannot find the program “svn”, you don’t have it installed.

WP-Subversion

Automatically post commit messages from your public Subversion repository.

Adam Harley (Kawauso)

Checks for the presence of the <code>.svn</code> directory in each plugin’s directory. Disabled for plugins with their files directly in the <code>/plugins/</code> directory to prevent false positives.
Also supports other systems through the use of the <code>REVISION_CONTROL</code> constant. Just set this to the directory created by your revision control system in your <code>wp-config.php</code>
Based on <a href="http://developersmind.com/2010/06/12/preventing-wordpress-from-checking-for-updates-for-a-plugin/" rel="nofollow ugc">code</a> by PeteMall.

No Updates for Plugins under Revision Control

Prevents plugins from being updated by the WordPress updater if they are under Subversion revision control (or other systems).

WP-Subversion vs No Updates for Plugins under Revision Control