Our source control server runs Subversion; see Source Control for details specific to SpookyDistance.

The Subversion command command-line client is dead easy to use. Give it a try rather before spending time hunting for GUI interfaces. (They do exist.)

Hint: Start with "svn checkout https://danm.homelinux.org/sdx/repos/sdx/trunk your-working-directory". Most subsequent operations in the working directory won't need the URL.

Documentation for Subversion:

• https://danm.homelinux.org/doc/subversion/book/book.html is the version that goes with our server. This is a single-page HTML version; it may take a little while to load over the DSL connection.
• http://svnbook.red-bean.com/ is the official home of the Subversion book.

The software:

• A native Windows version of Subversion is available from http://subversion.tigris.org/project_packages.html.
• The version available as a Cygwin package seems to work nicely, also.