IM+ Talk for symbian 5th edition such as Nokia 5800 or N97 allows you can chat with Skype friends, call any PC, mobile phone, making it very cost effective and it does not need WiFi and works on all carriers networks as well
Octrotalk - a Mobile Instant Messaging with voice and video integration. This always-on product keeps you connected with your buddies, and your buddies reach you whenever, wherever. Works seamlessly over GPRS/EDGE/CDMA/Wifi/Bluetooth data connections, and cuts down your phone bills
IM for Nokia - Instant Messaging on your Nokia device let's you stay in touch with all your IM buddies while on the go. Access the world ’s most popular IM services, including Google™ Talk (GTalk), Windows Live Messenger®, Yahoo! ® Messenger, and Ovi Chat
Gizmo for S60 - Install the Gizmo client onto your device to start making internet calls and using instant messaging (IM) and Presence. After installing the application you will be able to create an account or use the existing Gizmo username and password
FriendChat - There's no better way to chat with all your Facebook friends on the move than with FriendChat. Connect to your online friends instantly and chat away as much as you like. It's quick, responsive and easy to use too. So, if you love Instant Messaging and love Facebook, you'll love this app! Download FriendChat now for FREE
Nokia Chat is more than just messaging. You can share your status and your location, giving you physical presence! Start a Nokia Chat with your friends with instant and voice messaging and finish it face-to-face. Get together with Nokia Chat – it’s where we are now
Spark is your customizable Home screen with everything you want in one place - featuring live Facebook & Twitter streams, Deals from Groupon, News from CBS News, SKY News & AP News, Sports, Location-aware Weather from WeatherBug & More! Update your Facebook & Twitter at the same time. Keep up with breaking news, entertainment, and sports stories
fring Video Calls and Voice and Text - fring gives you FREE video calls, voice calls and live chat to your fring buddies and to other internet friends on popular social networks
Ovi Contacts is a place where you can find your friends, see where they are and what they are up to. It is all about keeping close to people who matter.
If you have used already Nokia Chat you will find Ovi Contacts mobile application familiar