Belion - Track your time and calculate your profits.
Invoice Ninja - Invoice Ninja is a free, open-source solution for invoicing and billing customers.
SC Shipping Rates Calculator - Show a shipping calculator with geolocation on your cart page.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Margin Calculator - We Are From Business Community And Helping Business Owners To Calculate Margin, Profit, And Loss.
GnuCash - A personal and small-business financial-accounting software, licensed under GNU/GPL and available for Linux, Windows, Mac OS X, BSD, and Solaris.