IMHere -Free MSN/Yahoo messenger for mobile phones. You only pay the internet traffic (GPRS or UMTS). No extra fees or whatsoever. Sending messages and photos is much cheaper than SMS and MMS and you can reach all your buddies on PC and mobile.
When logged in you get the same contact list as on your PC
Sydewynder is an open-source SMS receiver and sender application written in Python for Symbian S60 phones. It can automate the responses of messages and can be used as a mobile application server in areas where setting up a traditional server may be difficult or illegal
Nokia Connectivity Analyzer-Do you have hard times to understand why your WLAN connection is not working at home? Nokia Connectivity Analyzer provides three kinds of utilities to diagnose and analyze WLAN and Packet Data connections
TODAY, Mobile Application is a piece of generative design for mobile phones. It’'s an application that visualizes personal mobile communication. It sits on the periphery of the machine, monitoring our connectivity through the number and type of calls we receive, subtly displaying them back to us, in the form of a generative graphic
EzSniffer is a network protocol analyzer for Symbian OS 7.0 and above, though aimed to developers, may result of interest to advanced users.
EzSniffer is freeware and available for Series 60 now
Pixelpipe Share Online (Symbian)-Upload photos, video, audio & files to over 75 social web services with Pixelpipe. With integration with most applications supporting the Nokia "Send" menu there's no easier way to get your media off of your Nokia & out to your favorite social network, photo/video sites, blog or online storage services
Forward-An application which allows the user to forward on files which have been received over Bluetooth, infrared, MMS or e-mail. Also includes the ability to copy files in the Inbox to elsewhere on the phone.
Note that phones based on Symbian OS v7