The Aero Glass effect was first introduced in Windows VIsta by Microsoft. They continued it into Windows 7, but in Windows 8 they completely dropped it out. The Aero Glass effect makes the borders of the windows look like hazy semi-transparent glasses. It is a very cool looking effect and makes using Windows operating system a very pleasing experience in general. If you want to use the Aero Glass effect in Windows 8.x (8 or 8.1), then you can use the freeware and open-source Aero Glass interface library. It can bring the transparent effects of the Aero Glass into Windows 8.x natively without claiming too many of your system resources (RAM or CPU), although a better GPU will make your PC run smoother.
You can get the Aero Glass for Windows 8.x from their sourceForge website. The download is available both for the 32-bot and 64-bit versions of Windows. After the installation you have to restart Windows. As Windows restarts (it takes longer time when Aero Glass is installed), you will be able to see the Aero Glass effect in all the open windows.
There are no options for you to set. The Aero Glass is completely integrated into the Desktop Windows Manager. It does not use any custom skinning engine, therefore it works with all the themes installed in your Windows PC.
Conclusion: The Aero Glass for Windows 8.x is the stable solution for bringing the Aero Glass effect in your Windows 8 or 8.1 computers. It completely integrates into Windows without consuming too many of your computer resources.
You can download Aero Glass for Windows 8.x from http://glass8.berlios.de/.