Simple Bundles & Kits

It took a little bit for me to get familiar how this apps works, but once you get the concept it is pretty straight forward. Some minor customization might be required if you want certain things not to be shown on the order confirmation or order status page, but they have good/great support articles which describe the necessary steps. Their customer service is also very good & responsive. I decided to go with the paid version of this app and I don't regret it.