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.

Invoice Ninja is a free, open-source solution for invoicing and billing customers. With Invoice Ninja, you can easily build and send beautiful invoices from any device that has access to the web.

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.

From invoicing to expense tracking to accounting, Akaunting has all the tools you need to manage your money online, for free.

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.

A comprehensive invoicing platform offering customizable templates, tax compliance, fraud protection, and client portal. Supports software integration, online estimates, GST invoicing, recurring billing, credit management, and global operations with multilingual and multicurrency support.

Cakedesk is a simple and fast invoicing app for freelancers. Keep an overview of all your clients, write proposals that win deals and create professional invoices that get you paid.

Tryton is a three-tiers high-level general purpose application platform under the license GPL-3 written in Python and uses PostgreSQL as database engine. It's the core base of a business solution providing modularity, scalability and security.

Painless invoicing with stunning customizable templates.

Simplifies invoices and expense tracking, helping you save time and money. Create your first invoice in less than 60 seconds.

Tired of difficult, outdated invoice methods? Try Finmei. It's a simple, easy solution for managing invoices and expenses, freeing up your time to grow your business.

Your all-in-one business web app. Master your freelance admin, one habit at a time.