aMSN - aMSN is a free open source MSN Messenger clone.
Swift XMPP Client - Swift is an elegant, secure, adaptable and intuitive XMPP client, with features that make it...
Trillian - Trillian is a decentralized and federated instant messaging platform that lets your whole company send private and group messages, keep tabs on what co-workers are doing, share files, and much more.
SANeForce - SAN Pharma Sales Force Automation
Secure Instant Messaging - Instant messaging over IP with encrypted data
Facebook Messenger - Facebook Messenger is a faster way to message.