The Evernote Cloud PHP SDK by Evernote is the official PHP implementation by Evernote. This SDK calls the Evernote Cloud API which provides data collection services. Developers need to obtain an API key.
Kenya currently lays claim to the world's largest user base of mobile money. With over 25 million mobile money users in the country, Kenya seems to be a mobile developer's dream when it comes to potential user base. However, as COSEKE's Kevin Njoki told ITWeb Africa, developers face major roadblocks in monetizing apps despite the massive mobile money user base. At the heart of the difficulty lies a lack of open APIs from the country's leading telecommunication companies.
When Zappos released its API, there was a strange restriction: no mobile applications. While sometimes lawyers write terms that aren't formally enforced, Zappos made it clear on its API mailing list that it was serious. Soon, the restriction will be removed and mobile applications will be allowed without written approval.
Food-sharing mobile photo app Foodspotting had an API since day one. Of course, every mobile app has an API, at least if it needs to store or retrieve non-trivial data. Most of those interfaces stay hidden away, private APIs with only that single, internal audience. Foodspotting, on the other hand, signed Zagat as an early partner and now also has OpenTable, among others, using its Foodspotting API. The company is not exactly making it widely available for any developer, though the documentation is public, planting it in a vast grey area that's becoming increasingly common.