Arora uses the QtWebKit port of the fully standards-compliant WebKit layout engine. It features fast rendering, powerful JavaScript engine and supports Netscape plugins.
Apart from the must-have features such as bookmarks, history and tabbed browsing Arora boasts:
very fast startup
integration with desktop environments
smart location bar
session management
privacy mode
flexible search engine management
ClickToFlash plugin
download manager
WebInspector, a set of tools for web developers
30 translations
Arora began as a demo by Benjamin Meyer to help test the QtWebKit component, but since then it has grown into its own project outside of Qt.
Read more: Google code