Subversion

Subversion is an open source SCC tool.

Subversion access

Subversion is accessible inside the OS with several tools:
TortoiseSVN client to Subversion

Subversion hosting

There are several online subversion hosting providers. A list is available at SVN hosting comparison.
Slik offers a free plan for 10 MB based in the Netherlands and focuses on Europe.

Blogs

Jim Kring's blog Thinking in G has a category on TortoiseSVN with additional thoughts, howto's and tricks.