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.
Latest Version
TortoiseSVN 1.9.4, built against Subversion 1.9.4. Released April 28, 2016.
Grab it from the download page.
Make sure to read the release notes first!