1. Miranda IM

Miranda IM is a multi-protocol instant messaging client for Windows. Very light on system resources and extremely fast, Miranda IM requires no installation and can be made to fit on a single floppy ...

2. Pidgin

Pidgin is an instant messaging program for Windows, Linux, BSD, and other Unixes. You can talk to your friends using AIM, ICQ, Jabber/XMPP, MSN Messenger, Yahoo!, Bonjour, Gadu-Gadu, IRC, Novell GroupWise ...

3. Gizmo5

Gizmo5 is a free phone for your computer, mobile and tablet. Voice Calls Call anyone in the world for free from your computer, save big on calls from your mobile phone. Instant Message Chat with friends ...