Free Desktop book-keeping software for small-businesses & freelancers
Open Source Point of Sale is a web based point of sale application
Firefly III: a personal finances manager
Simple and elegant invoicing solution
Online Accounting Software
A lightweight, self-hosted personal finance app
A high-performance algorithmic trading platform
Currency data API
A terminal spreadsheet multitool for discovering and arranging data
Open-source pricing and billing infrastructure
Quickly obtain real-time data of the funds of interest
A nimble options backtesting library for Python
Kimai is a web-based multi-user time-tracking application
Professional financial tools: 16 sections with text and visual reports
Personal and small-business finance manager
The free and Open Source productivity suite
Free Invoice & Billing Software for Windows, Linux & Mac
Chromis POS, the new evolving face for your point of sale needs
An integrated word processor and spreadsheet for RISC OS and Windows
Open-source business management software
Kraft helps to handle daily quotes and invoices in your small business
SME Accounting package, General Ledger, Debtors, Creditors, Stock
Budget management
Finances personnelles assistées par ordinateur.