It is trivial to use Mercurial client (TortoiseHg) to access Subversion repositories. Once you have the latest TortoiseHg, the process works easily. First you need to grab the hgsubversion extension:
mkdir C:\repos
hg clone http://bitbucket.org/durin42/hgsubversion/ C:\repos\hgsubversion
Info about the hgsubversion extension. Then, you enable the extension:
Right-click context menu - TortoiseHg - Global Settings - Edit File - add the lines below to your Mercurial.ini file:
[extensions]
hgsubversion = C:\repos\hgsubversion
Now you can, for example, grab the Autofac repository, using the usual check-out path prefixed with SVN:
svn+https://autofac.googlecode.com/svn/trunk
Read more: Rinat Abdullin