Yahoo Messenger is an application that attempts to tie together many things from chat and video conferencing to social media all in a single interface. Messenger is intended as a central program that anyone can use to connect with others online regardless of the service. Users can chat live online through Messenger or Facebook. Messenger can funnel chat through a mobile device. It has high-quality video chat built into the program. There are even integrated features like social media games, groups and contacts. Messenger is driven by advertising. The interface can also seemed cluttered since so many features are available. Yahoo Messenger provides everything necessary to stay connected with others online.
The popular add-on, updated for Windows Live Messenger 2011
VIPole Secure Messenger
VIPole strongly encrypts messages, group chats, voice/video calls and files from prying eyes
WhatsApp for PC - not quite there yet
Free PC-Based Software to Send Text Messages and Video Calls