Credit Karma - Receive your free credit score instantly and review your real credit report online.
My Data Manager - Description Take control of your mobile data and save money on your mobile phone bill!
Experian - Your credit report, FICO Score, and more. All free.
Data Usage - Data Usage Monitor | Your guard against data plan overages.
Credit Sesame - Credit Sesame Credit Sesame
NetCounter - NetCounter is a simple network traffic counter for EDGE/3G and Wi-Fi. It shows your data usage.