I did some searching, and couldn’t really find much that works on free hosting.
I don’t know how well they suit your needs, but here s what I did find.
1.
Older versions of PrestaShop still work on free hosting, according to this forum post:
Using older versions of software isn’t really a good thing, as It may have security issues and may become outdated after a while, but it’s the best I could find.
**2. **
SnipCart. I found snipCart, and while they do have a free plan, they take two per cent of your revenue, if you make over $629CAD. If you don’t, you pay $13CAD/month.
I don’t know how much you are planning to make, but either way, you’ll be paying less if you fork over about $20USD/yr at premium, it works with all the latest software.
Or you could go for the “I am special” plan in SnipCart and pay for it, but you have to contact them for custom plans.
hope this helps