Let’s be honest, the mobile phone is a godsend. It takes communication to a higher plane on a daily basis. Most of the time we don’t even realize there’s so much more out there in terms of applications and services that we can use to enhance communication. Here are a few applications you can get for free that will help you stay tuned into the net and keep communication alive!
VoIP and Chat Apps
VoIP or Voice over Internet Protocol is, simply put, a way to use your mobile to make calls via your mobile internet service. It also enables users to make cheap international calls to landlines and mobiles by using applications such as Skype or any other Internet voice service (SIP-compatible services) such as SIPNET or EuteliaVoIP from non-SIP enabled handsets.
Chatting is a way to keep in touch with friends and family alike using PC chat applications like GTalk, MSN and Yahoo! Messengers. Yes, it's become something we do every day. Chatting isn’t merely a social networking solution but also a way to keep in touch with business clients and such.
Fring
Fring is a mobile internet service & community that allows users to stay in touch with almost all the popular social networks (G-Talk, MSN and Yahoo! Messenger and even AOL AIM). It also lets you keep in touch with Skype contacts. Fring allows you to make VoIP calls as well as chat with your IM buddies while on the go. It serves a dual purpose and can be used in areas where Wi-Fi is available (if your phone supports it). This makes the application that much more versatile.
eBuddy
Email is one way to get the message across, but an obviously simpler way is by simply using a chat application. Technology being the way it is, if you have it on your PC it's almost a given that you can have it on your mobile phone as well. Enter eBuddy Chat, application extraordinaire: it supports GTalk, MSN and Yahoo! Messenger, and they can all be used simultaneously.
Gizmo
Another great VoIP application is Gizmo. It’s free too, but does have a certain limitation. Gizmo only allows VoIP calling and chatting with users who have the same app as well as support for Yahoo!, AOL and GTalk. So here's another fully functional chat/VoIP application for your S60 mobile.
Profimail is a great email client. 
