ENat Offline for MSN Messenger enable you to send a message to your friend even if he is offline. Offline messages will be delieved to your friends immediatelly when he signs in next time. The add-on is fully integrated into MSN Messenger.

Mirador Instant Messenger is a secure, reliable and feature-rich presence based messaging solution built for the enterprise. It offers advanced functionality, security and stability that businesses require and helps to ensure compliance with HIPPA

It is a user-friendly messenger with extended features and handy interface. It provides full-featured real-time communication between LAN users and does not require servers. It is able to exchange messages with Microsoft WinPopup.

Akeni Secure Messaging Server: Expert Edition, is a secured client/server instant message solution for business. It supports standard messaging features such as chat, conference (group chat), notification, and file transfer.

VirtualCamera is a virtual software camera that can be installed on Windows 98, ME, 2000 and XP. No extra hardware is needed. It can use your former media, including pictures, movies as its sources, and let your application use it as a real camera.

FlashDeli (Flash Delivery) is an instant messaging system for your LAN or intranet. FlashDeli gives you an ability to easily exchange messages with your colleagues and neighbors. It will give you a solid boost in office productivity.

Join live streaming video chat rooms where you can see, hear, and chat with many users at once. Camfrog Video Chat also has a live photo webcam directory where you can find a partner for one on one video chat.

NetTalker is local network instant messaging and communications system for Windows. NetTalker can use like server and as client and allows the ability to "chat" in real-time instant messaging on a secure, private local network.

Huminity is a free social networking and chat software that allows you to chat with anyone, navigate animated maps of connections and view the links of friends between you and anyone else – Huminity 6-degree chat!

IRCXpro Messenger is the first of its kind. It is an IRC/IRCX client that looks exactly like an Instant Messenger.