What version control tool(s) do you use?

[EHaskins]

I've been using SVN for some time, but I'm starting to have issues. I have been using TortiseSVN, which is a great tool, connected to a file system repository on a network share or external drive or some type. This is an acceptable system for small projects, but when I need to be able to colaborate with others it is often nessisary to have a secure repository on the internet. I host several websites already, all running on IIS7, so most of the hosting issues should have been solved, but no.

SVN is only compatible with Apache and IIS and apache don't play well together, so if I want an SVN server then I would need to either migrate all of my existing websites to Apache or, run the SVN server on another machine. Neither of these options are practical.

I also can't afford to pay for SVN hosting by someone else.

So, finally to my question. I'm looking for alternitives to SVN, or at least a way to host it.

What version control tool(s) do you use, if any, and you do use one does it work when IIS is installed, or even on Windows?

Thanks,
Eric