DisplayCAL (formerly known as dispcalGUI) - Open Source Display Calibration and Characterization powered by Argyll CMS
Emojination - A simple design tool combining emojis and modern aesthetics.
Lagom LCD monitor - Lagom LCD Monitor is one of the best monitor calibration software that combines monitor calibration technology with an easy-to-use interface.
emojione - The finest emoji you can use legally
QuickGamma - monitor gamma calibration, monitor gamma correction, monitor gamma adjustment, adjust monitor gamma, calibrate monitor gamma, adjust monitor brightness and contrast, monitor gamma correction utility
App Icon Template - Royalty free app icon creator for iOS, OS X and Android