We are launching an open-cart driven store for ebooks, and are looking for some help with custom development for a couple features:
1. removing shipping and shipping address options (its 100% electronic delivery)
2. removing the cart (customer buys only 1 product at a time), so go directly from the product page to payment
3. creating bundles of products (a product that contains 3 other products, which are not available to purchase individually)
4. combine registration inline with checkout
5. making the system trigger an external API for each purchase, so the books can be generated and sent.