GitShowcase - Plug and play portfolio for developers
GPACalculator.io - The easiest way to calculate your GPA
GPortfolio - Create an automatic portfolio based on Github profile.
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.
Webfolio - Showcases your best code to startups and get hired
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.