Based on the open-source WebKit layout engine, coupled with Chrome's V8 JavaScript engine supporting HTML5 and CSS3.
Multi-touch
Android has native support for multi-touch which was initially made available in handsets such as the HTC Hero.
Multi-tasking
User can jump from one task to another and same time various application can run simultaneously.
Resizable widgets
Widgets are resizable, so users can expand them to show more content or shrink them to save space
Multi-Language
Supports single direction and bi-directional text.
GCM
Google Cloud Messaging (GCM) is a service that lets developers send short message data to their users on Android devices, without needing a proprietary sync solution.
Wi-Fi Direct
A technology that lets apps discover and pair directly, over a high-bandwidth peer-to-peer connection.
Android Beam
A popular NFC-based technology that lets users instantly share, just by touching two NFC-enabled phones together.