Here is a list of all topics with brief descriptions:

AddressBook	Provides cross-platform interface to access the contact information
App Shortcuts	Provides cross-platform interface to facilitate updating the current version of the application
AppUpdater	Provides cross-platform interface to facilitate updating the current version of the application
BillingServices	Provides cross-platform interface to request payment from a user for additional functionality or content that your application delivers.
Cloud Services	Provides a cross-platform interface to sync information across various devices by storing it in the cloud
Deep Link Services	Cross-platform interface to handle deep links
Game Services	Provides cross-platform interface to easily integrate popular social gaming functionalities such as achievements, leaderboards
Media Services	Provides cross-platform interface to access devices's media gallery and camera for picking/saving images/videos/documents etc
Native UI	Provides a group of classes to access native UI components
Network Services	Provides cross-platform interface to check network connectivity status
Notification Services	Provides cross-platform interface for scheduling, registering and handling notifications
Rate My App	Provides option for user to rate the app
Sharing Services	Provides a cross-platform interface to access sharing services
Task Services	Provides cross-platform interface to schedule or continue tasks in background
Utilities	Provides cross-platform interface to access commonly used native features
Web View	Provides a cross-platform interface to display web contents inside your application