mIRGGI is the first IRC client for S60 3rd Edition devices. It is currently in early stages because I just began writing it on 10th of March. I've been meaning to do this for a long time but haven't gotten to it. I don't like the J2ME IRC clients (one big reason is that they suck up a lot of memory on S60) and I don't like using PuTTY, especially on devices without keyboard
Agile Messenger is the most feature rich and versatile Instant Messenger for mobile phones on the market today. Agile Messenger is used daily by over 2,000,000 users and has been perfected based on feature requests and feedback from tens of thousands of users. No other mobile Instant Messenger is as mature and reliable as Agile Messenger
IM+ Lite (S60 3rd Edition) - Chat within AIM/iChat, MSN/Windows Live Messenger, Yahoo!, ICQ, Jabber, Google Talk and MySpace IM from your mobile phone regardless of location and mobile operator. No cost per message!
"IM+ Lite (S60 3rd Edition)":
· Communicate with all your friends in a single buddylist, share your files and photos
IMChat- an Instant Messenger java application for mobile phones that works with MSN messenger.
# Messages can be sent to other peoples mobiles using GPRS at a cheaper cost than sending SMS messages.
# (You just pay for the GPRS connection and data transfer rates set by your mobile Operator
T2Me (Push-to-Talk) for Series 60 is a Push-to-Talk system which converts your existing cellular phone into a virtual Walkie- Talkie; it lets you exchange voice messages with other Talk2Me users anywhere in the world simply by typing in their phone numbers and a button-push
XpressChat - Do you know what the "fellow traveler's syndrome" is? This is when you tell a perfect stranger your innermost secrets, just knowing that you will hardly ever meet again. Usually this happens when you travel by train, taxi, hitchhiking, long airplane flights - when next to you for a long time is an accidental ally
EQO (S60 3rd Edition) is a free application that brings your world to your mobile phone. Chat on the go using MSN, AIM, Yahoo, Google Talk, QQ (NEW!), ICQ and Jabber, or call and text anyone in the world at super-low rates