4.JPGPidgin was formerly known as Gaim. Pidgin is an instant messaging client that can be used in different platforms. Pidgin is capable of supporting the commonly used protocols of different instant messaging platforms. This allows users to log into many different instant messaging services by using just a single application.

According to statistics, it is estimated that the number of Pidgin users across the world has reached to over three million in 2007. Pidgin is considered free software under the GNU General Public License.

Some of the supported protocols of Pidgin are as follows: .NET Messenger Service (MSN), AIM, ICQ, Google Talk, Gadu-Gadu, Yahoo!, Skype, Bonjour and Lotus Sametime.