Open Source Financial Software - Page 2
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Invoice Ninja
Free and Open Source Invoicing, Expenses & Time-Tracking
Invoice Ninja is a free and open source invoicing, expenses and time-tracking app built with Laravel and Flutter. It offers a plethora of great features, including custom branded invoice design, recurring invoicing and auto-bill clients, real-time quote creation and custom proposals, expense reporting and so much more! Invoice Ninja is also capable of handling online payments from more than 40 payment gateways, including Stripe, PayPal and WePay. It also accepts payments using credit cards, ACH, Bitcoin and more. Get paid online, organize project workflows with Kanban Boards, and track time online via your Webapp account all with Invoice Ninja. -
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AI Hedge Fund
An AI Hedge Fund Team
This repository demonstrates how to build a simplified, automated hedge fund strategy powered by AI/ML. It integrates financial data collection, preprocessing, feature engineering, and predictive modeling to simulate decision-making in trading. The code shows workflows for pulling stock or market data, applying machine learning algorithms to forecast trends, and generating buy/sell/hold signals based on the predictions. Its structure is educational: intended more as a proof-of-concept than a ready-to-use financial product, giving learners insight into the mechanics of quantitative finance automation. The project underlines AI’s potential in investment strategies but also carries disclaimers that it is for research and not financial advice. The implementation is designed so developers can study the pipeline end-to-end: from data ingestion through modeling to simulated portfolio management. -
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Lago
Open Source Metering and Usage Based Billing API
Lago offers a self-hosted and cloud, scalable and modular architecture for metering and usage-based billing, at every stage of your company. Ingest up to 15,000 billing events per second. Lago’s event-based architecture provides a solid foundation for building a fair pricing model that scales with your business. Lago supports all pricing models. Create pay-as-you-go and hybrid plans in no time with our intuitive user interface or API. Create engaging marketing campaigns and increase conversion with coupons that customers can redeem to get a discount. Lago allows you to create one-time charges that are invoiced on the fly. Depending on the configuration of your plans, Lago automatically calculates what each customer owes you and generates invoices. Unlock recurring revenue opportunities for pay-as-you-go pricing models with Lago’s real-time prepaid credit features. -
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Open Tax Solver
Calculates income tax form entries, helps do your taxes.
OTS is a safe, secure, easy-to-use program for calculating Tax Return Form entries, and determining your tax-owed or refund-due, for Federal or State personal income taxes. Includes updated versions for US 1040, Schedules A, B, C, D, and for several states. OTS provides both graphical and textual interfaces for quickly filing out your tax forms. --- Best way to download the correct version for your platform -- go to the OTS WEBSITE: =====> https://opentaxsolver.sourceforge.net/ -
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Group Office groupware and CRM
Take your office and CRM into the cloud!
Installation instructions can be found here: https://groupoffice.readthedocs.io/en/latest/install/install.html Group Office is an open source groupware application. It makes your daily office tasks easier. Share projects, calendars, files and e-mail online. It is a complete solution for all your online office needs. From a customer phone call to a project and finally an invoice. The support system helps to keep your customers happy. Group Office is fast, secure and has privacy by design. You can stay in full control of your data by self hosting your cloud and e-mail. Our document editing solution keeps all data on the secured server instead of synchronising it to all user devices. GroupOffice is open source and modular. Which means it’s easy to customise and extend. You can turn off and on features and it enables any developer to create new modules for the platform. -
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Actual Budget
Fast, privacy-focused personal finance app
Actual Budget is a fast, privacy-focused personal finance app built around the proven envelope budgeting methodology. It keeps you in control of your money with tools designed to help you make thoughtful financial decisions rather than relying on automated guesswork. The app is fully local-first, meaning it works offline and syncs quietly across your devices without ever compromising ownership of your data. Optional end-to-end encryption ensures your financial information stays private, even when using self-hosted sync. With intuitive budgeting tools, streamlined transaction management, and powerful custom reporting, Actual Budget makes it easier to understand your spending and savings. It brings all your accounts, budgets, and insights together in one beautifully designed and lightning-fast interface. -
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Quadratic
Data science spreadsheet with Python & SQL
Quadratic enables your team to work together on data analysis to deliver better results, faster. You already know how to use a spreadsheet, but you’ve never had this much power before. Quadratic is a Web-based spreadsheet application that runs in the browser and as a native app (via Electron). Our goal is to build a spreadsheet that enables you to pull your data from its source (SaaS, Database, CSV, API, etc) and then work with that data using the most popular data science tools today (Python, Pandas, SQL, JS, Excel Formulas, etc). Quadratic has no environment to configure. The grid runs entirely in the browser with no backend service. This makes our grids completely portable and very easy to share. Quadratic has Python library support built-in. Bring the latest open-source tools directly to your spreadsheet. Quickly write code and see the output in full detail. No more squinting into a tiny terminal to see your data output. -
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Barcode4J is a flexible generator for barcodes written in Java and available under the Apache License v2.0. Features: Extensions for Apache FOP, Xalan-J and SAXON, Servlet, command-line interface, output to SVG, EPS, Java2D/AWT and bitmaps.
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FOSSBilling
Empower your hosting business with FOSSBilling
FOSSBilling is a free and open-source billing and client management solution tailored for online services businesses, particularly those in the web hosting space. It delivers a suite of tools that automate the creation and delivery of invoices, track payments, manage customer accounts, and handle service provisioning, all from a centralized web interface. Because it’s self-hosted and licensed under the Apache 2.0 license, organizations have full control over their data and can customize or extend the system to fit unique workflows or branding requirements. FOSSBilling supports integration with numerous control panels and payment gateways, helping businesses automate domain management, hosting account creation, and customer notifications without manual intervention. The platform is built to be extensible, with a modular architecture that allows developers to add new features, themes, or third-party extensions. -
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Firefly III
Firefly III: a personal finances manager
Firefly III is a personal finance manager and double-entry accounting tool built to help individuals and small organizations track budgets, investments, debts, and expenses. Users can import bank statements (CSV, OFX, QIF) or integrate via APIs, map transaction categories, and reconcile accounts. The system supports budgeting schedules, repeating transactions, automatic categorization rules, and reporting dashboards to analyze trends over time. For investments, it tracks price history, performance, and holdings, allowing users to see their net worth across accounts and assets. Because of its foundation on solid accounting principles, it supports transfers, splits, credits, and sign conventions accurately. It can be self-hosted, allowing users full control over their financial data, with modular architecture and RESTful APIs so other tools or mobile apps can integrate. -
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ImportExcel
PowerShell module to import/export Excel spreadsheets, without Excel
ImportExcel is a popular PowerShell module that enables reading, writing, and manipulating Excel spreadsheets without requiring Microsoft Excel to be installed on the host. It exposes straightforward cmdlets like Import-Excel and Export-Excel that convert between Excel sheets and PowerShell objects, making it simple to pipeline tabular data into reporting and automation flows. Advanced features include adding and formatting tables, setting number/date formats, creating charts, and applying styling or conditional formatting programmatically. The module is optimized for performance (streaming where possible) and supports large datasets, making it useful for ETL tasks, automated reporting, and data analysis in pure PowerShell environments. It integrates well with scheduled jobs and CI pipelines where generating or consuming spreadsheets is part of an automated workflow. -
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Kalshi Trading Bot CLI
AI-native CLI for trading Kalshi prediction markets
Kalshi Trading Bot CLI is an AI-driven command-line tool designed to automate trading strategies on Kalshi prediction markets by combining quantitative modeling with real-time market data. It operates by conducting deep research on events, generating independent probability estimates, and comparing those estimates against current market prices to identify trading opportunities. The system incorporates advanced decision-making logic, including Kelly criterion-based position sizing and a structured multi-step risk evaluation process before executing trades. Built as a CLI application, it allows traders to interact programmatically with markets, making it suitable for automation and integration into larger trading pipelines. The tool emphasizes disciplined trading through its risk engine, ensuring that decisions are filtered through multiple validation layers before capital is committed. -
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Wealthfolio
A Beautiful Private and Secure Desktop Investment Tracking Application
Wealthfolio is a simple, desktop-based investment tracker. Your financial data is stored safely on your own computer Ditch the spreadsheets, forget about those pesky subscription fees, and no more worries about SaaS services playing around with your data. Forget juggling spreadsheets or compromising privacy with online apps. Choose Wealthfolio's simple, secure approach to manage your finances. Gather all your investment and savings accounts in one place. See everything at a glance, from stocks to savings! Import your statements from your broker or bank. Track your accounts' holdings and performance over time. See how a particular account is performing, and how it's changing over time. -
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pmxt
A unified API for trading across prediction markets
PMXT is a powerful, cross-platform terminal emulator and multiplexer designed to enhance productivity for command-line users by seamlessly blending terminal emulation with workspace management. It lets you run multiple shell sessions in panes and tabs, detach and reattach to workspaces, and persist session layouts—making it ideal for developers, sysadmins, and power users who juggle many concurrent tasks. PMXT also includes built-in features like customizable keybindings, layout presets, and scripting hooks so you can tailor your environment to your workflow without relying on external tools. Unlike simpler terminal emulators, it is built with session continuity in mind: you can close a window and later restore your exact layout and running processes without losing context. The project emphasizes performance and responsiveness, ensuring that even large logs, long-running compiles, and interactive workflows feel smooth and stable. -
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Accouting Excel
Accounts33.zip is a MS Excel VBA Software of Financial Accounting
Accounting Excel is a MS Excel Vba free open source software awarded as Community Choice by sourceforge.net. Any password you may use at login screen. First change Windows System date in dd-mm-yyyy format. Autofill option is included in Account Description .To any person obtaining a copy and associated documentation files (the "Accounts33.zip"). Trading Account in included. Go to excel option then advance option then trust Centre setting then enable macro settings. User can delete previous data and start fresh, this and Cash Flow Statement have been included. Print and convert to pdf file option is included in every statement page. PLEASE READ AccountingExcelReadMe.txt file or Guide menu in main menu of this Application to work with it. [2026] [Asis Kumar Goswami] akgbest77@yahoo.com -
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Open Source Point of Sale is a web based point of sale system written in the PHP language. It uses MySQL as the data storage back-end and has a simple user interface. **Active development and maintenance has been moved to github (see homepage link)** If you like the project, and you are making money out of it on a daily basis, then consider to buy me a coffee so I can keep adding features.
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Cybera is an Internet cafe administration system. It works with prepaid cards or client accounts or in a post paid Self Service mode. Features include workstation control, user rights lockdown, accounting, stats and screen replication for CAI.
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Free Weighbridge Software
Imagic Solution Easy to Use Windows Based Weighbridge Software
Imagic Solution Provide Easy to Use Windows Based Weighbridge Software, its Support Win10/Win11/Win7, 32 and 64 Bit both OS. Facility to Create Multi User with Various Authorisation, it will Provide Secure Weighment with Various Facility Like CCTV Image Capture, RFID Reader Integration, Boom Barrier Integration, Traffic Light, PA Sound System, LED display etc... This Software Provide a secure and Fraud-Free-Operation of All Kind Of Weighbridge, its Design to Suitable for all Kind of Industries. It will use Configurable various Database as per requirement. Software Suitable for In Bellow Sector: Industries Weighbridge [LAN Based Software for Multi Weighbridge], Public Weighbridge, Cloud Based Online Weighbridge Reporting system, Label Printing Scale Software, Batching Scale Software, Barcode + QR Code printing, CCTV Weighbridge Software, Support Multi Language Selection Option, -
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Barter
Open-source Rust framework for building event-driven systems
Barter is an open-source, Rust-based ecosystem of libraries for building high-performance, event-driven algorithmic trading systems—covering live trading, paper trading, and backtesting. It is designed for safety, speed, and flexibility in quantitative finance workflows. Use mock MarketStream or Execution components to enable back-testing on a near-identical trading system as live-trading. Centralised cache-friendly state management system with O(1) constant lookups using indexed data structures. Robust Order management system - use stand-alone or with Barter. Turn on/off algorithmic trading from an external process (eg/ UI, Telegram, etc.) whilst still processing market/account data. -
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Java CSV Library
Small, fast Java library for reading and writing CSV files
Java CSV is a small fast open source Java library for reading and writing CSV and plain delimited text files. All kinds of CSV files can be handled, text qualified, Excel formatted, etc. -
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EZ Bookkeeping
A lightweight, self-hosted personal finance app
Ez Bookkeeping is an open-source personal finance and bookkeeping web application designed to help individuals and small businesses track income, expenses, accounts, and budgets with simplicity and clarity. It provides a clean, modern interface where users can enter transactions, categorize expenses, and visualize financial data through dashboards, charts, and monthly summaries so that users can better understand their cash flow and spending patterns. The system supports multiple account types (such as bank accounts, cash, and digital wallets) and enables reconciliation to ensure records match actual balances. Users can set budgets, receive alerts when thresholds are approached, and generate financial reports like profit and loss statements or category breakdowns, empowering better planning and decision-making. Because it’s self-hostable with a straightforward stack, users can deploy it locally or on private servers, ensuring full control over sensitive financial data. -
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NautilusTrader
A high-performance algorithmic trading platform
NautilusTrader is an open-source, high-performance, production-grade algorithmic trading platform, provides quantitative traders with the ability to backtest portfolios of automated trading strategies on historical data with an event-driven engine, and also deploy those same strategies live, with no code changes. The platform is 'AI-first', designed to develop and deploy algorithmic trading strategies within a highly performant and robust Python native environment. This helps to address the parity challenge of keeping the Python research/backtest environment, consistent with the production live trading environment. NautilusTraders design, architecture and implementation philosophy holds software correctness and safety at the highest level, with the aim of supporting Python native, mission-critical, trading system backtesting and live deployment workloads. -
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StockSharp
Algorithmic trading and quantitative trading open source platform
Algorithmic trading and quantitative trading open source platform to develop trading robots (stock markets, forex, crypto, bitcoins, and options).StockSharp (shortly S#) – are free programs for trading at any markets of the world (American, European, Asian, Russian, stocks, futures, options, Bitcoins, forex, etc.). You will be able to trade manually or automated trading (algorithmic trading robots, conventional or HFT). FIX/FAST, ITCH (LSE, NASDAQ), Blackwood/Fusion, BarChart, CQG, E*Trade, IQFeed, InteractiveBrokers, LMAX, MatLab, Oanda, FXCM, OpenECry, Rithmic, RSS, Sterling, BTCE, BitStamp, Bitfinex, Coinbase, Kraken, Poloniex, GDAX, Bittrex, Bithumb, HitBTC, OKCoin, Coincheck, Binance, Liqui, CEX.IO, Cryptopia, OKEx, BitMEX, YoBit, Livecoin, EXMO, Deribit, Huobi, KuCoin, BITEXBOOK, CoinExchange, QuantFEED and many other. -
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Lázaro es un sistema de gestión comercial pequeño pero flexible y ampliable (facturación y POS) para Windows y Linux.
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JExcelApi is a java library which provides the ability to read, write, and modify Microsoft Excel spreadsheets. This project mirrors the files on http://www.jexcelapi.org, which has been known to go down on occasion.
