PKSArena BluChat - bluetooth based chat application. Enjoy unlimited chats with other users of PKSArena BluChat. Using this application, users can send unlimited messages between themselves (over bluetooth) without incurring any data transfer or sms charges. The source code for PKSArena BluChat is completely open source.
CellSerf CellSerf - CellSerf is a mobile application for Multimedia Instant Messaging, Global Multimedia Mobile Messaging and Multimedia Email that allows users to go beyond the traditional style of communicating in Text.
The Instant Messaging service of CellSerf enables users to connect to their Yahoo, MSN and Google Talk accounts together
Bluetooth Chat by TechCyber Bluetooth Chat by TechCyber - Bluetooth Chat by TechCyber - Free chat application for bluetooth enabled mobile phones. Its completely free to use, and you can chat with your friends even while sitting in class or seminar, that too for free completely