GnuCash - A personal and small-business financial-accounting software, licensed under GNU/GPL and available for Linux, Windows, Mac OS X, BSD, and Solaris.
Travelstop - Simplify your business travel 👩🏻💻
Synder - AR Automation
Cherry - Let employees take company perks in their own hands
Xero - Xero is online accounting for your small business.
Xpenditure - Xpenditure is a mobile and web-based expense management system.