you're a geek? Internet Explorer Developer Channel Version

Internet Explorer Developer Channel
The Developer Channel provides a version of the browser for you to explore
 and test upcoming features and web standards support under development.
 Download this Channel to try out our new features before they are broadly available,
and share your feedback with us to improve the product and let us know the features you need.

Some options:
WebGL
WebGL is a JavaScript API that enables developers to create simple shapes
and animations to complex shaders, in both 2D and 3D in browsers that support WebGL.
In this Developer Channel we've updated the WebGL renderer with instancing support,
 to speed up WebGL performance where the same shape needs to be duplicated over and over. Watch Sr. PM Frank Olivier provide an overview of the new features to the renderer
for you to test against.
Gamepad API
The Gamepad API allows one or more gamepads connected to your device
 to be accessed by JavaScript, which is exciting news for gamers and developers.
Developers can query the position of the thumb sticks, know which buttons are pressed,
and listen for connect and disconnect events.
Software Engineer Matt Esquivel discusses the Gamepad API for you to test against.
WebDriver
In this Developer Channel release, we introduce WebDriver support within Internet Explorer
for the first time.
We have implemented many of the high priority features from the W3C spec to allow developers to open a session, automate basic functionality against their pages,
and get back the results of their tests. Use the C# sample linked below to get started.
Take WebDriver for a test drive and tweet feedback to @IEDevChat or over in Connect.
F12
In this Developer Channel release has a number of updates to the F12 developer tools,
both large and small. This release impacts the F12 UI, console, DOM explorer, Debugger,
 Emulation tool, UI Responsiveness and Memory profiling tools.
Developer tools PM Andy Sterland, provides a lap around the changes
for this Developer Channel release for you to test and provide feedback on.