BatteryCare - BatteryCare - Application and good practice guide for maintaining and optimizing the battery of the modern laptop
Accubattery - Monitor's battery capacity through the use of science
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)
GSam Battery Monitor - Monitor your android devices battery usage.
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.
BatteryBar Pro - BatteryBar Pro is software for windows that enables users to check their Battery performance and stats.