Capsicum by Illuminated Bits - Plan your day. Track your habits. Tell your story.
My Data Manager - Description Take control of your mobile data and save money on your mobile phone bill!
Task List - Personal task manager and to-do list app for iPhone and iPad
Data Usage - Data Usage Monitor | Your guard against data plan overages.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
NetCounter - NetCounter is a simple network traffic counter for EDGE/3G and Wi-Fi. It shows your data usage.