There is a lite version that is free to download and use but if you want the advanced features you will have
to pay and fund the cost of the active development and time that the boys at db put into there products.
@3poder, I'm assuming you could also be asking about whether a product can be listed as 'free' and downloaded in Classifieds itself?
It's possible to mark items as 'digital' meaning they can be downloaded, but a download mechanism isn't built into Classifieds. And for now, it's not possible to list items for free, though it is one feature we intend on adding in the next big update.