Sage Intacct - Intacct is a cloud-based accounting and financial management system that is designed for the businesses of all levels.
Invoice Ninja - Invoice Ninja is a free, open-source solution for invoicing and billing customers.
Diversiview Online - Portfolio Analysis and Optimisation software for retail investors and investment advisors.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
SoftLedger - Cloud-based accounting solution for SMBs
GnuCash - A personal and small-business financial-accounting software, licensed under GNU/GPL and available for Linux, Windows, Mac OS X, BSD, and Solaris.