Best free affiliate module?

[Cindy2010]

Hello,

I did some search but can't find any good results on this yet.

I am thinking to setup affiliate modules, something like, for example, if customer comes to my site (and made a purchase) using a url like:
www.mydomain.com/product1?affiliateid=xxx
Then the owner of that affiliateid=xxx will get his credit (say: 5% of total sale, or a fixed credit of $10).

For this purpose, what will be the best module out there? (hope it is free or low cost)

Thanks.

[Brent]

Have a look at the Recommended Services.

I think JROX offer a free version that is limited to 50 users.