Raw sockets API
API to manage telephony calls
The messaging API
Contacts Manager API specification
Task Scheduler API Specification
the app: URI scheme, for packaged apps
Application Lifecycle and Events
Runtime and Security Model for Hosted Web Applications and Packaged Applications
API to retrieve the status of the device capabilities supported and system information from the underlying device.
Application Management API: installing, uninstalling, launching, stopping applications.
Test suites for System Applications WG specs
Repository of the W3C System Applications Working Group
SysApps WG Notes