Software

Local-first personal finance tool based on zero-sum budgeting, supporting synchronization across devices, custom rules, manual transaction importing (from QIF, OFX, and QFX files), and optional automatic synchronization with many banks. ([Source Code](https://github.com/actualbudget/actual))

Financial accounting and inventory management software for small to medium businesses. ([Source Code](https://github.com/bigcapitalhq/bigcapital))

Cryptocurrencies payment processor and development platform. ([Demo](https://admin.bitcart.ai), [Source Code](https://github.com/bitcart/bitcart))

Bitcoin and other cryptocurrencies payment processor. ([Demo](https://mainnet.demo.btcpayserver.org/), [Source Code](https://github.com/btcpayserver/btcpayserver))

Accept Web3 Payments directly into your wallet. Peer-to-peer, free, self-hosted & open-source. ([Demo](https://depay.com/products/payments), [Source Code](https://github.com/depayfi/widgets))

Budgeting application for managing personal and family finances, supporting multiple currencies, joint accounts, and budgets. ([Demo](https://demo.econumo.com), [Source Code](https://github.com/econumo/econumo))

A lightweight personal bookkeeping app hosted by yourself. ([Demo](https://ezbookkeeping-demo.mayswind.net/), [Source Code](https://github.com/mayswind/ezbookkeeping))

Web frontend of Beancount, a text based double-entry accounting system. ([Demo](https://fava.pythonanywhere.com/example-with-budgets/income_statement/), [Source Code](https://github.com/beancount/fava))

Firefly III is a modern financial manager. It helps you to keep track of your money and make budget forecasts. It supports credit cards, has an advanced rule engine and can import data from many banks. ([Demo](https://demo.firefly-iii.org/), [Source Code](https://github.com/firefly-iii/firefly-iii))

Hosting and billing automation. Integrates with WHM, CWP, cPanel and HestiaCP. Full API and easily extensible. ([Demo](https://fossbilling.org/demo), [Source Code](https://github.com/FOSSBilling/FOSSBilling))

Membership management web application aimed towards non profit organizations. ([Source Code](https://github.com/galette/galette))

Wealth management software to keep track of stocks, ETFs and cryptocurrencies. ([Source Code](https://github.com/ghostfolio/ghostfolio))

Assets management and booking for small/medium companies. ([Source Code](https://github.com/JeromeDevome/GRR))

Manage your shared expenses, easily. ([Demo](https://ihatemoney.org/demo/), [Source Code](https://github.com/spiral-project/ihatemoney))

Manage quotes, invoices, payments and customers for your small business. ([Source Code](https://github.com/InvoicePlane/InvoicePlane))

Track expenses, payments & create professional invoices & estimates (fork of Crater). ([Source Code](https://github.com/InvoiceShelf/InvoiceShelf))

Subscription billing & payments platform. Have access to real-time analytics and financial reports. ([Source Code](https://github.com/killbill/killbill))

Personal finance manager. ([Demo](https://kresus.org/en/demo.html), [Source Code](https://github.com/kresusapp/kresus))

Metering and usage-based billing. ([Source Code](https://github.com/getlago/lago))

Budgeting application focused on planning for recurring expenses. ([Source Code](https://github.com/monetr/monetr))

Secure, browser-based, password-only self-custodial cryptocurrency wallet. ([Demo](https://app.mybucks.online), [Source Code](https://github.com/mybucks-online/app))

Personal finances platform (web + REST API + Android) that'll help you budget, keep track of your income/spending and forecast your financial future. ([Demo](https://github.com/afaneca/myfin?tab=readme-ov-file#demo-account---try-it-for-yourself), [Source Code](https://github.com/afaneca/myfin), [Clients](https://github.com/afaneca/myfin-api))

Cryptocurrency trading bot. ([Source Code](https://github.com/Drakkar-Software/OctoBot))

Simplistic and straightforward budgeting app to track your budget across months and years. ([Demo](https://simonwep.github.io/ocular/demo/#demo), [Source Code](https://github.com/simonwep/ocular))