<p>Which <strong>standalone Windows GUI application</strong> do you recommend for use for accessing a Subversion repository?</p>

<p>Edit: A lot of people are mentioning Tortoise, however I am looking for an application not a shell extension.  Also people are questioning my reasoning behind not wanting to use a shell extension.  In our environment we rather interact with the repository (when not using an IDE plugin) through a management application and not navigate the files through Windows Explorer.</p>

TortoiseSVN
From their website:
A Subversion client, implemented as a windows shell extension.
TortoiseSVN is a really easy to use Revision control / version control
  / source control software for Windows. Since it's not an integration
  for a specific IDE you can use it with whatever development tools you
  like. TortoiseSVN is free to use. You don't need to get a loan or pay
  a full years salary to use it.