Accubattery - Monitor's battery capacity through the use of science
BatteryCare - BatteryCare - Application and good practice guide for maintaining and optimizing the battery of the modern laptop
GSam Battery Monitor - Monitor your android devices battery usage.
Wattagio - Powerful battery informer and save power assistant for Mac
BatteryMon - BatteryMon is a battery monitoring software solution.
coconutBattery - With coconutBattery you are always aware of your current battery health. It shows you live information about the battery in your Mac and iOS devices (iPhone, iPad)