>Is Visual Source Safe the only source code control product that works with VFP. Has anybody experience with another products ?

You can use the CVS (http://www.cvsnt.org/, at the server side) and Jalindi Igloo (http://www.jalindi.com/, at the client side) combo. It works really ok - and fully integrated - but please make a backup copy of your project before adding it to source control (I experienced some occasional problems with the initial import, but after that it works smoothly).