Airbnb for Business - Redefine business travel for your team
GnuCash - A personal and small-business financial-accounting software, licensed under GNU/GPL and available for Linux, Windows, Mac OS X, BSD, and Solaris.
opentrip - business travel smarter and easier
Synder - AR Automation
Claire - A new intuitive way to compare and book flights
Xero - Xero is online accounting for your small business.