Giftship: Gift Options & More

We use the GiftShip app on our Cart, as well as their "big brother" Wholster app. Both are fantastic for split-shipping an order, and are well designed for user experience. GiftShip works well for "self-serve" customers to fulfill an order to ship to multiple addresses; Wholster is great for larger split-ship orders, or B2B customers who need invoicing options.
The Support team is helpful, responsive, and quick to find solutions when there are small bugs or hiccups.