Rokumo does gift-shopping for its users.
Users go on the site and enter what they want to buy their friends and on what dates. Rokumo keeps track of these dates year-round, orders everything, packages it all together, then mails it back to the user.
Rokumo is an integrated solution. There are calendar apps, and there are individual vendors that sell various gifts, but no place to get "gift-shopping" done as a whole. Rokumo lets users abstract gift-shopping into one process: to buy a friend a gift, a user would enter "Mary's birthday; March 14; $10 Macy's Gift Card + 10 red roses." Rokumo takes care of literally everything else.