Giftbit Payment API - Stripe for gift cards
LoveSales - Find and save products you love, get alerted when they go on sale.
Postmates - Anything, anytime, anywhere. Postmate it. Food, drinks and groceries available for delivery or pickup.
TrackIf - Alerts you if the price of your favorite products drop
Gift Hero - The best wish list ever
Giftwhale - Giftwhale allows you to create personalised wish lists online.