JuiceDefender - Über 5.
Save contacts - Save contacts app provides features through which users can select the desired data to create the backup in a variety of different formats.
Easy Battery Saver - Easy Battery Saver, your super battery savior
SIM Contacts Manager - SIM Contacts Manager app offers features that let you insert your sim card to your mobile phone to manage, edit, add, and delete your contacts right at your fingertips.
Greenify - Greenify is a mobile app that gives you greater control over your Android device's power usage, allowing you to get a lot more mileage out of your battery life without having to constantly plug it back into a charger.
X-Transfer - X-Transfer is an app by WebToGo that comes up with features to help you in performing data transfer between your smart devices in a few simple steps.