Amazon just made setting reminders with Alexa a lot easier. The Reminders API allows developers to include reminders within a particular skill in three simple steps. Prior to the Reminders API, customers needed to remember to create the right skill at the right time to get a specific reminder.
Every once in awhile you see one API provider making use of APIs from another. This is the case with the eBay Developers Program, who have announced the new eBay API Release Calendar. The calendar is itself a mashup, having been developed using the Google Calendar API. The resulting app is simple but works well: it's color-coded to distinguish the significance of dates that correspond to each event.