Wireless-DS for gsm modem 

Wireless Dev Studio is an ActiveX DLL that allows you to send and receive SMS (also binary, flash, Unicode (UCS2) and ultiple SMS) through GSM modems. It handles voice and GSM data calls and the phonebooks of both SIM and terminal.
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ABChat 

ABChat is a web based chatroom service for your website visitors.
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Zbit J-Chat Pro 

The J-Chat Pro is fast, reliable, scalable, fully customizable and easy to install chat application without page flickering. Hosts multiple sites, private rooms, and moderated chats. Private messages, ignore, kick, ban and abusive words.
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