BloomThat - The best way to send flowers
LoveSales - Find and save products you love, get alerted when they go on sale.
Wildflower - Send a randomly generated flower for Valentine's Day
TrackIf - Alerts you if the price of your favorite products drop
Tweet-a-Cake by NotPie - Send anyone real life cake on Twitter
Giftwhale - Giftwhale allows you to create personalised wish lists online.