While map mashups are what have defined this genre of application, the second most popular type of web mashup here on ProgrammableWeb are photo mashups. How popular? Just this past week the number of photo-related mashups passed the 500 mark, and there are now 505 listed.
Infradox serves up your archive of photo and video on a high volume basis. The Infradox API is actually two APIs: a "Partner API" and a "Back Office API." The partner API is, not surprisingly, for your partners so that they can connect live with your Infradox database. Responses are in XML.
Apple's iOS Camera APIs make the iPhone a manual camera—for third party developers. Fleksy to be early out of the gate on iOS 8, but could use more APIs. Plus: Australian startup says it owns the "HealthKit" name, and Contract Logix a API integration.