ICQ

ICQ provides cross-platform messaging capabilities, which include text, voice and video. Its controls are easy to learn, even for novice users. The best part is that the application is available for Mac OS X and Windows and for mobile platforms, like iOS, Android and others. It is offered completely free of charge and you can have it up and running in no time.

Although it is larger than that of other instant messengers, the application's user interface doesn't have too many controls. Your contacts list is displayed on the left side of the window and you can chat with selected people in the larger area on the right. New contacts can be found by their email addresses or account names or by various criteria, like name, sex, location, age and so on.

Besides adding contacts that use ICQ, you can also connect the application to Facebook or other social networks and chat with all your friends on a single window. As previously suggested, ICQ is not limited to text messages. You can also make voice and video calls and invite people to existing conversations. Sending and receiving files is another possibility.

The application doesn't have much to show on the surface, but it has much to offer under its hood. High quality voice and video calls are just one example. Another clear advantage is the fact that ICQ is cross-platform. This means that you can chat with your friends from a PC, Mac or an Android, iOS or Windows-powered smartphone.