I forgot to mention. Tortoise is a front end for Subversion. It doesn't work by itself - you have to install it after you install Subversion.

>Hi, everyone
>
>http://subversion.tigris.org/
>
>It's the open source equivalent of VSS. It works over Internet (this is good) and it's completely free (this is even better). It doesn't "lock" the files using any mechanism (which, IMO, is bad, but your oppinion may vary).
>
>This is a command line tool. If you want a different feeling, you can use Tortoise (http://tortoisesvn.tigris.org/). Screenshots are self explanatory.
>
>
>Thank you.