今天无意中在网上发现了这个东西，下面是他的简介：
http://www.xenocode.com/browsers/
About the Xenocode Browser Sandbox
The Xenocode Browser Sandbox allows all popular Windows browsers to be run simultaneously, directly from the web. Web designers, system administrators, and other users can now evaluate Internet Explorer 8, 7, and 6, Mozilla Firefox, Apple Safari, Opera, and Google Chrome directly from the web in a risk-free manner. Unlike traditional software applications, Xenocode WebApps do not require any software to be installed and allow multiple application versions to run side-by-side on any version of Windows.
以前用IETester，其中最不爽的就是无法使用开发工具，现在可以了！
