Gchat Google Talk Client for Windows Phone 7.5
Recently I got a HTC Mozart with Windows Phone 7 from Microsoft for testing my apps (encouraging developers ). I also have HTC desire with Android 2.2 in it. After switching to Windows Phone 7 the main thing I was missing was Google talk client which Android has built in it. So I tried searching in the Windows Phone 7 marketplace and I came up with Gchat Google Talk client.
Gchat Google talk client is quite well integrated in the Windows Phone 7 OS. When I first installed the service as expected it had a metro like look and feel. After logging using my Google credentials I was able to see all my contacts list with which I can start my conversation easily.
If you are expecting a long and frequent chat with some few friends you can tap that particular users to home screen and it will be very easy to start the conversation. It also includes the Push notification whenever it receives the new message
credit : Microsoft