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)
BatteryBar Pro - BatteryBar Pro is software for windows that enables users to check their Battery performance and stats.
Accubattery - Monitor's battery capacity through the use of science
BatteryInfoView - small utility for laptops and netbook computers that displays the current status and information about your battery
GSam Battery Monitor - Monitor your android devices battery usage.
BatteryMon - BatteryMon is a battery monitoring software solution.