Invoice Ninja - Invoice Ninja is a free, open-source solution for invoicing and billing customers.

Morningstar Direct - Morningstar Direct is a web-based investment management software that offers you a wide range of features and tools to invest in potential opportunities.

Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.

BlackRock Aladdin - BlackRock Aladdin is an advanced-level portfolio management software that helps you to manage and view your daily investment under the guidance of highly trained investment professionals.

GnuCash - A personal and small-business financial-accounting software, licensed under GNU/GPL and available for Linux, Windows, Mac OS X, BSD, and Solaris.

Vyapar - Vyapar is a free GST billing and accounting platform that handles the invoicing queries with the help of an inventory management system.