UI Movement - The best UI design inspiration, daily
GPACalculator.io - The easiest way to calculate your GPA
Muzli - UI/UX and Design Inspiration Chrome Extension
calculator.net - Online calculator for quick calculations, along with a large collection of calculators on math, finance, fitness, and more, each with related in-depth information.
UI Jar - Hand-picked design inspiration for your real life projects
Grade Calculator - Calculate your grades with a simple and free to use Grade Calculator. Make calculation in a few clicks and save the results in PDF format.