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.
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
Power Battery - Power Battery, as the most professional battery saver app, could get up about 60% more battery life for Android phones or tablets.
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
Accubattery - Monitor's battery capacity through the use of science
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.