Yahoo! Messenger is a user-friendly application that helps you communicate with your friends. You can send instant messages without spending a single penny. You can download the software and log in with your Yahoo ID. Its intuitive user interface is suitable for all users. Aside from sending and receiving one-on-one messages, you can join public chatrooms to make new friends. You can integrate it with Facebook chat as well as enjoy social games. It’s a lightweight tool that doesn’t negatively influence your system’s performance. You can customize its appearance and visit help section if you can’t understand its functionalities.