gfxCardStatus is an unobtrusive menu bar app for OS X that allows MacBook Pro users to see which apps are affecting their battery life by using the more power-hungry graphics.
The standard for battery reading since 2005
With coconutBattery you are always aware of your current battery health. It shows you live information about the battery quality in your Mac, iPhone and iPad
GPG Suite
One simple package
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The USB Overdrive is a device driver for macOS that handles any USB or Bluetooth mouse, keyboard, trackball, joystick, gamepad or gaming device from any manufacturer and lets you configure it either globally or on a per-application, per-device basis. Note that the Apple Magic Mouse and Magic Trackpad are not handled by the USB Overdrive to let macOS implement its full multitouch support.
The USB Overdrive reads all kinds of wheels, buttons, keys, switches and controls and assigns them to useful actions like clicking, typing, scrolling, launching, opening documents and so forth. It can easily handle several USB devices at once and can assign different settings to each one.
Paparazzi! is a small utility for macOS that makes screenshots of webpages.