shopifyapi
this bundle implements the shopify product api as described here http://docs.shopify.com/api/product by using great guzzle/guzzle webservice description, leading to a cool restful interface.
to "talk" with shopify you'll need private api key and password of your shopify shop and add it as "shopify_base_url" to your parameters.yml http://docs.shopify.com/api/tutorials/creating-a-private-app
an example call to get the number of products in your shop would look like this... curl http://localhost/shopify/product/count/