Google Talk

Download Google Talk 1.0.0.104 Beta
The Google Talk downloadable application for Windows offers many features for communicating with your friends and family.
Instant messaging - Chat with all of your Google Talk and Gmail contacts in real time.
Free PC-to-PC voice chat - You can talk to anyone else for free who's online and has the Google Talk client.
Send and receive voicemails - If the person you're calling isn't available, you can leave a voicemail.
Unlimited file transfers - Send files to your contacts. There are no file size or bandwidth restrictions.
Gmail notifications on your desktop - When you're signed into Google Talk, you'll be notified of new messages in your Gmail inbox.
This Google application is very user friendly, it sports a clean look along with basic customization functions. Nothing too fancy or too difficult, just the functions one needs when looking for a simple chat.
Once the Google username and password is typed in, the user logs in, yet, just like in any other IM software, contacts need to be added to the list before starting a conversation. Messages can be sent even if the target contact is not online since they will receive the text when they log in.
Users can write status messages, send files, create voicemails and place calls, common activities typically included in most applications of its kind. A user image can also be set, selecting one of the default ones or choosing one from the user's PC. 
However, unlike regular instant messengers, Google Talk is also an email notifier, as it will display alerts whenever an email message is received, while also showing the total number of unread emails. 
The Settings window comes with a few available options, allowing users to customize the chat window, to select the type of notifications they prefer or block some contacts from their list. Also, there is also the possibility to save the chat history within their Gmail account, so it can be easily accessed, regardless of the host PC.
Google Talk 1.0.0.104 Beta Latest Version