Here is a simple handy free app that access Google Talk and Facebook Chat from One Single window. Talk.to, a simple handy application that brings all your Facebook and Google Talk contacts together so you can chat with ease.
The best thing is that you can add multiple Gtalk and Facebook accounts. This is particularly useful when you have separate personal and business Gmail accounts.
Talk.to works with devices running Android 2.2 and up, looks good on both smartphones and tablets and is available for free in the Play Store.
It supports multiple accounts on both networks and receives push notifications too, so you can rest assured that you’ll know when your contacts are sending you messages in real-time as long as you’re online.
There are many Free apps available to do this, like Nimbuss, Im+, ebuddy etc. All these apps provides advance features like, group sharing, multiple Social Network chat, group chat, VOIP services and many more.