Live Messenger Mobile - Live Messenger Mobile is a free software that allows you to chat with your MSN contacts. It needs a GPRS connection on your mobile. It is not an official product, just a freeware!
VicinityMatch - Bluetooth Based "VicinityMatch - Bluetooth Based" uses bluetooth to make a match between you and other people nearby. It also allows you to send and receive anonymous messages between matched users
Galaxy Galaxy is a mobile social network which allows you to live a full virtual life in your mobile phone! Chatting, sending private messages, meeting new people and playing online games are just a few of the benefits which you will have with Galaxy!