GnuCash - A personal and small-business financial-accounting software, licensed under GNU/GPL and available for Linux, Windows, Mac OS X, BSD, and Solaris.
uniCenta oPOS - Award winning Point Of Sale
HomeBank - Access Financial Services. Easy, fee-free banking for entrepreneurs Get the financial tools and insights to start, build, and grow your business.
Booking Ninja - Booking Ninja allows you to create a free, simple, online reservation tool for your restaurant or cafe.
Money Manager Ex - Money Manager Ex is a free, open-source, cross-platform, easy-to-use personal finance software.
Hostme - Reservation, table, waitlist and loyalty management for restaurants