Gone - An ephemeral to-do list

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.

Streaks - The to-do list that helps you form good habits.

Easy Grade Calculator - Easy Grade Calculator is a website that provides a range of calculators, including Grade Calculators, Tip Calculator, Percentage, Loan, and Password Calculator.

Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

Unigradecalc - Unigradecalc is a website that provides a tool for calculating GPA (Grade Point Average).