GnuCash - A personal and small-business financial-accounting software, licensed under GNU/GPL and available for Linux, Windows, Mac OS X, BSD, and Solaris.

flyceipts - A fresh look at digital receipts & other documents.

HomeBank - Access Financial Services. Easy, fee-free banking for entrepreneurs Get the financial tools and insights to start, build, and grow your business.

Keep Your Friends Close - A free e-book about maximizing Customer Lifetime Value

Money Manager Ex - Money Manager Ex is a free, open-source, cross-platform, easy-to-use personal finance software.

Ramp Receipts - Create a receipts/invoice dashboard for Stripe