Arora: A light-weight, cross-platform web browser based on WebKit
That's because Arora is built to work on any platform that supports the Qt toolkit. I first noticed Arora's existence when the folks at Canonical picked it as a possible default web browser for Kubuntu 9.10.
The browser has a couple of features that are all the rage with the kids these days, including full page zoom (as opposed to text-only zooming), and a private browsing mode that will let you surf without saving any cookies or other personal data to the hard drive. It's also relatively light on system resources, and boots and loads web pages reasonably quickly.