ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
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.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Accubattery - Monitor's battery capacity through the use of science
LightShot - The fastest way to take a customizable screenshot.
Power Battery - Power Battery, as the most professional battery saver app, could get up about 60% more battery life for Android phones or tablets.