- [Akaunting](https://akaunting.com/) - Akaunting is a free, online and open source accounting software designed for small businesses and freelancers. ([Source Code](https://github.com/akaunting/akaunting)) `GPL-3.0``PHP`
- [Boodle](https://github.com/manuel-uberti/boodle) - Simple accounting single-page application in Clojure and ClojureScript. `EPL-1.0``Java`
- [BTCPay Server](https://btcpayserver.org/) - A self-hosted Bitcoin and other cryptocurrencies payment processor. ([Demo](https://mainnet.demo.btcpayserver.org/), [Source Code](https://github.com/btcpayserver/)) `MIT``C#`
- [Budget App](https://github.com/paukiatwee/budgetapp) - Budget App is an open source personal budgeting application. `Apache-2.0``Java`
- [budgetzero](https://github.com/budgetzero/budgetzero) - Free, self-hosted, open-source, envelope-budgeting web and desktop app. ([Demo](https://app.budgetzero.io/budget)) `AGPL-3.0``Nodejs`