Similar on the lines of Prism to convert web applications into desktop applications, here is Gabtastik. It provide web browser freedom for Gtalk and facebook chat.

It alllows you to keep gtalk and facebook chat sessions open on your Windows desktop outside of your regular web browser, using minimal screen real estate and system memory.

You can specify window display level and window opacity (yeah, play around!). Besides, you can quickly toggle between Facebook and Gtalk chat with ease.

Download Gabtastik to enjoy facebook and gtalk chat without the need to keep specific website or browser open all the time. Connect with chat friends in easy and different way, game for it?