Group separate products into packages with discounts

[Kenja]

We're looking at creating customized packages of products for our customers. We'd like the ability to group multiple products into a "package" with it's own price. However, when the package gets added to the cart, I want it to add the individual products and apply a "package discount" to the order. Does anything like this exist? I thought I saw something like this a couple years ago, but can't seem to find it again.