Apps similar to Invoice Rex include GnuCash, which is free and open source. Other options are Odoo, MoneyManager Ex, Invoice Ninja and Manager. You can choose from more than 10 Invoicing Software like Invoice Rex for Mac, Windows, Linux, the web and iPhone.
GnuCash is a versatile financial-accounting software designed for both personal and small-business use. With features like double-entry, scheduled transactions, and multi-currency support, it operates across various platforms, including Windows, Mac, and Linux, ensuring accuracy through professional principles.
United States
Open-source business application suite developed in Python, offering ERP, CRM, e-commerce, and project management, reducing software needs and synchronization costs with over 260 core modules.
Belgium
EU
MoneyManager Ex is a free, open-source, cross-platform, easy-to-use personal finance software. It primarily helps organize one's finances and keeps track of where, when and how the money goes. It is also a great tool to get a bird's eye view of your financial worth.
Free, open-source invoicing and billing platform providing PDF invoice generation, client payment options through 30+ gateways, multiple templates, company logo addition, team roles, time tracking, advanced customization through paid plans, and no installation required.
United States
Manager is free accounting software for Windows, Mac and Linux.
It features an intuitive and innovative user interface with modules such as cashbook, invoicing, receivables, payables, taxes and comprehensive financial reports.
The desktop edition is free while the cloud edition.
United Kingdom
Offers accounting software with payroll, bookkeeping, invoicing, app integration, and inventory tools. Four plans cater to businesses of all sizes. Automates reconciliation and shares with accountants seamlessly. Higher tiers add project tracking.
United States
InvoicePlane is a self-hosted open source application for managing your quotes, invoices, clients and payments. The application comes with various options, templates and settings to customize your invoicing experience.
Comprehensive cloud accounting for small businesses and freelancers; save time billing clients by sending, tracking, and collecting payments swiftly. Generate professional invoices, manage expenses effortlessly, track project time seamlessly, and prepare for tax with ease.
Canada
Personal and small business financial manager featuring bank account, credit card, and investment tracking, budgeting and forecasting tools, live-updating financial charts, debt tracking, report generation, data sync across devices, and goal planning tools.
United States
Organize and analyze receipts, invoices, and documents on macOS with secure local storage, multi-device sync via shared folders, advanced OCR, auto extraction of financial details, self-learning categorization, invoice payment, scanner support, and local privacy protection.
GermanyEU
Freeware* Invoicing & Warehouse/inventory Management Software.
BulgariaEU
Japan
