NinethSense

IE10 Platform Preview 1, available for download today is the first step in delivering the next wave of progress in native HTML5 support. Web sites and HTML5 run best when they run natively, on a browser optimized for the operating system on your device.

More details here.

I just made this simple tool made with C#. I hope this tool is useful for checking alignments etc. of your applications. You might have seen similar guides feature in PhotoShop software.

Future plans:

• Ability to add N number of guidelines (currently it supports only one)
• Vertical & Horizontal scales
• Saving last guides

Download Version 1.0

Let me know if you need source code.