GnuCash - A personal and small-business financial-accounting software, licensed under GNU/GPL and available for Linux, Windows, Mac OS X, BSD, and Solaris.
Mercury - Mercury is banking* for startups
Wave Financial - Award-winning financial software designed for entrepreneurs.
Brex - The first corporate card for startups
Profitt App - Manage the profit from all of your businesses and products.
Stripe Corporate Card - The corporate card for fast-growing businesses. 💳