If you’re a Windows 8 developer, install the Api World app for Windows 8.1 now. From the app description:
Description of API World
APIworld is an application to help developers find the API they need, easily. Developers will get randomly themed APIs and randomly picked APIs to try out. You can also use the Search charm to search for any APIs and the Share charm to share the API they like.
- Random API every time you open the app
- Search and Share Charm Features
What’s next? Why a Windows Phone app of course! Tweet to @mashape if you’d like to contribute.