Profit First Calculator - Calculate business accounts using the Profit First method
SC Shipping Rates Calculator - Show a shipping calculator with geolocation on your cart page.
FB ads budget calculator - Easily calculate your Facebook ads profit potential
Online Shipping Calculator - A fast and easy way to compare shipping costs of packages originating in the United States.
The Freelance Rate Calculator - Get your minimum viable freelance rate
Belion - Track your time and calculate your profits.