chitchat - Chat Room with Selfies and Pagers (yes, pagers!)
DU Battery Saver - DU Battery Saver, get up to 50% more battery life for your Android phone. Battery Saver learns how you use your phone, then creates smart profiles that match your settings to your needs while getting more life from your battery.
Chalk - Chalk is a calculator that tries to do right what others do wrong.
Accubattery - Monitor's battery capacity through the use of science
Twist - Check fewer notifications, do more meaningful work. Twist is the team communication app for calmer, more organized, and more productive teamwork.
Power Battery - Power Battery, as the most professional battery saver app, could get up about 60% more battery life for Android phones or tablets.