Whenever you are idle, and not at the desk, you staying online may just keep your friends waiting for your reply when they ping you. This is sometimes irritating for the friend on other side, so either you need to be logged out totally or let your friends know about your actual status. So here is an easy-to-use tool for windows users who use gtalk, and would want to let their friends know about their status of being away for that while.
Its Gtalk Autoreply software, which would just need your gtalk ID and password, and a message that needs to be sent to your friends who ping you on gtalk while you are away.
There’s an option on whether you want the software to start automatically when Windows starts.