Open Source Windows Invoice Software
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Invoice Software for Windows
View 1706 business solutionsBrowse free open source Invoice software and projects for Windows below. Use the toggles on the left to filter open source Invoice software by OS, license, language, programming language, and project status.
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Simplify Purchasing For Your BusinessSimplify every aspect of buying for your business in Order.co. From sourcing products to scaling purchasing across locations to automating your AP and approvals workstreams, Order.co is the platform of choice for growing businesses.
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AestheticsPro Medical Spa SoftwareAestheticsPro is the most complete Aesthetics Software on the market today. HIPAA Cloud Compliant with electronic charting, integrated POS, targeted marketing and results driven reporting; AestheticsPro delivers the tools you need to manage your medical spa business. It is our mission To Provide an All-in-One Cutting Edge Software to the Aesthetics Industry.
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Frappe Books
Free Desktop book-keeping software for small-businesses & freelancers
Frappe Books is a free and open source desktop book-keeping software that's simple and well-designed to be used by small businesses and freelancers. It's got everything you need from a small business accounting tool: invoices, billing, payments, reporting and more. It's made to work offline using a local SQLite file as the database, so you don't have to be dependent on a Cloud service provider. Frappe Books features a clean and modern, web-friendly UI, beautiful invoice templates, standard financial reports and other great features. It's inherently portable and secure, as your data is never uploaded into the Cloud. -
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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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webERP Accounting & Business Management
Accounting & Best Practice Business Administration System
Entirely web-based. It is coded in efficient PHP to present a very low overhead on hardware presenting screens fast & capable of working over low bandwidth connections. Now with HTML 5 & javascript form validation & table sorting. Mature codebase with a wealth of features: - Multi-currency - Multi-inventory location - Serial and Lot tracking inventory - Full double entry general ledger - Weighted Average or Standard Costing - Manufacturing works orders - Material Requirements Planning - Shipment costing - Contract/job costing - Fixed asset management - Sales Analysis - Expense claims - Can be integrated with an number of 3rd party wikis Particularly suited to wholesale, distribution, manufacturing and now also as the hub for multi-branch retail businesses (with an external deskop POS add-on). Translations into over 20 Languages. Easily modifiable code, written using simple and accessible PHP for ease of maintenance and understanding. Reporting direct to UTF-8 PDF -
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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. -
Turn traffic into pipeline and prospects into customersDocket is an AI-powered sales enablement platform designed to unify go-to-market (GTM) data through its proprietary Sales Knowledge Lake™ and activate it with intelligent AI agents. The platform helps marketing teams increase pipeline generation by 15% by engaging website visitors in human-like conversations and qualifying leads. For sales teams, Docket improves seller efficiency by 33% by providing instant product knowledge, retrieving collateral, and creating personalized documents. Built for GTM teams, Docket integrates with over 100 tools across the revenue tech stack and offers enterprise-grade security with SOC 2 Type II, GDPR, and ISO 27001 compliance. Customers report improved win rates, shorter sales cycles, and dramatically reduced response times. Docket’s scalable, accurate, and fast AI agents deliver reliable answers with confidence scores, empowering teams to close deals faster.
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Kimai
Kimai is a web-based multi-user time-tracking application
Kimai is an open-source time-tracking solution. It tracks work time and prints out a summary of your activities on demand. Yearly, monthly, daily, by the customer, by the project. Its simplicity is its strength. Due to Kimai’s browser-based interface, it runs cross-platform, even on your mobile device. With Kimai, the boring process of feeding Excel spreadsheets with your working hours is not only simplified, it also offers dozens of other exciting features that you don't even know you're missing so far! The layout is fully responsive, made for desktop and mobile usage. Every user can configure the data columns that should be shown, e.g. to prevent horizontal scrolling on small devices. Kimai was built to be extendable, and features can be added with plugins. Developers wanting to create them can use many extension points. -
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OpenSourceBilling
A super simple way to create & send invoices, receive payments online
OpenSourceBilling or OSB is a simple, open source web application for creating and sending invoices, receiving payments, managing clients, and tracking and reporting. There’s no need to pay for these services because OSB does it all for free and easily. OSB can produce reports of sales, payments and collected revenues, and simply makes billing and invoicing hassle-free. OSB comes with plenty of built-in features, such as recurring invoices, exporting to PDF, time tracking, receiving payments through Paypal and credit card, Freshbooks and Quickbooks data importing and more. It also supports several different languages as well as currencies. -
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accountill
Fullstack open source Invoicing application made with MongoDB
This is a side project I've been working on. A full stack invoicing application made using the MERN stack (MongoDB, Express, React & Nodejs), specially designed for freelancers and small businesses, but can be used for almost any type of business need. With this application, you can send beautiful invoices, receipts, estimates, quotes, bills etc to your clients. Jump right off the Live App and start sending invoice or download the entire Source code and run it on your server. This project is something I've been working on in my free time so I cannot be sure that everything will work out correctly. But I'll appreciate you if can report any issue. Send invoices, receipts, estimates, quotations and bills via email. Generate and send/download pdf invoices, receipts, estimates, quotations and bills via email. Set due date. Automatic status change when payment record is added. Payment history section for each invoice with record about payment date, payment method and extra note. -
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Vali Admin
Free Bootstrap 4 admin/dashboard template
Vali is a free, modular and easy-to-customize admin theme built using Bootstrap 4, SASS and Pug.js. Includes seven pre-built pages including login, user profile, and print-friendly invoice page. Run a npm install command in the project root directory to install and build dependencies. If you don't want to edit the theme you can use the compiled files inside the docs folder. Use npm run dev command to watch and compile source files. Use npm run build command to compile all source files. Use npm run start command to start a development server using NodeJs. Vali is a responsive and free admin theme built with Bootstrap 4, SASS, and PUG.js. It's fully customizable and modular. You don't need to add the code, you will not use it. Vali is a lightweight yet expendable and good-looking theme. The theme has all the features required in a dashboard theme but these features are built like a plug and play modules. -
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Crater
Free & Open Source Invoice App for Freelancers & Small Businesses
Crater is an open-source web & mobile invoicing app made especially for freelancers and small businesses. It's the complete invoicing solution you need, allowing you to track expenses and payments, calculate taxes, and create estimates and invoices. As both a web and a mobile app, Crater allows you to manage your invoices and keep track of everything even on the go. Crater's web application is made with Laravel & VueJS, while the mobile apps are built using React Native. Crater is a completely free and open source professional invoicing solution. Make the smart choice for managing your budding business's transactions with Crater. -
The full-stack observability platform that protects your dataLayer, tags and conversion dataCode-Cube.io detects issues instantly, alerts you in real time and helps you resolve them fast. No manual QA. No unreliable data. Just data you can trust and act on.
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Invoiso
Free Invoice & Billing Software for Windows & Linux
Free offline invoice software for Windows and Linux. Create professional PDF invoices, manage clients and products - no internet, no subscription, no account needed. Invoiso is a free, open-source desktop invoicing app for small businesses, shops, and freelancers on Windows and Linux. All data stays on your device — no internet required, ever. Default Login: Username: admin Password: admin You will be prompted to change the password on first login. -
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Applewood Computers Accounting System
Accounting system for smaller companies written in GnuCobol.
ACAS contains Sales, Purchase and Nominal Ledgers (Accounts Receivable, Payable and General Ledgers) as well as Stock Control (Inventory Control) along with IRS (Incomplete Records System). This system is written in COBOL and uses the free GnuCobol compiler which compiles via C code and is therefore compatible with the following platforms: Linux, Unix, Dos, Mac OSX, Windows providing you have installed the GCC C compiler or an equivalent as well as GnuCobol. at a minimum, v2.0+. Note that all testing is done using v3.2. The current version utilises standard Cobol files, be they sequential or indexed. The beta version, offers additional support for Mysql and Mariadb. This is available as v3.3 and as a nightly build direct from the lead programmer. -
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Aronium Free Windows Point of Sale
Easy to use, modern and reliable POS solution.
Speed From setup to selling in a minutes. With modern and simple interface you will be up and running in no-time. Discounts & promotions Keep your loyal customers. With our loyalty module, you can schedule promotions and automatically apply discounts to selected items. Support Have a question? We are here to help. Jump directly to our help center, or drop us a line, send suggestion, or just say Hi! Help is just an email away! Made for Windows Turn your PC into a functional Point of Sale. Worldwide Used in more than 40 countries every day. Is Aronium POS free? Yes it is. You can use free Aronium version as long as you like. There are no obligations or hidden costs. However, keep in mind that Aronium is a "freemium" product, meaning that there is a free version, and other paid versions or extensions offered as more advanced alternative. -
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Shop Management Solution
Best software solution for Small, Medium Retail shop Management
Shop Management Solution is an management information system (MIS) for Retailers who want to keep track of there profit and stock levels without the need of complex setups. Free Right to left languages Arabic / Urdu Edition: http://www.deluxewebapps.com/downloads/shop-management-solution-rtl Offical Page: http://www.deluxewebapps.com/downloads/shop-management-solution Bronze, Sivler and Gold Edition (Is available now) with value added features: - Bar Code Reader - Thermal Printer - Manage Invoices - Manage Purchase Orders - Manage Users - Reports (Sales, Stock, Purchases) - Multiple PC (Gold Edition) - Networking Free Trial (Bronze Edition):: http://www.deluxewebapps.com/trial Gold Edition URL: http://www.deluxewebapps.com/products/shop-management-solution-gold-edition Training & Help: http://deluxewebapps.com/blog -
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Open Source ERP
ERP Server
The Open Source ERP is a web based. The ERP server software runs on Linux. The ERP need no plugins in the browser on the client computer. The ERP can be accessed from any where with out effort. Be it at home with your home computer (Windows, Linux, MAC OS X), or traveling with your smart phone (iPhone, iPad, Android), or in the office, the data is always at hand. Webdav interface and Active Sync for synchronizing contacts and time management. In addition to customer, order, invoice management, etc... the ERP has a complete warehouse management including a order management for material in the warehouse. -
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Kimai - Time Tracking Software
Time-Tracking for companies and teams with up to 250+ users
Kimai is web based software that tracks work time, and classifies it. It tracks time and prints out a summary of your activities on demand. Yearly, monthly, daily, by customer, by project, by action. FETCH THE LATEST DOWNLOAD FROM GITHUB: https://github.com/kimai/kimai/releases Record expenses and print customizable invoices in different formats. For further information visit: - https://www.kimai.org - https://www.kimai.cloud - https://github.com/kimai/kimai -
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Fakturama - Invoicing Made Easy
The Open Source Invoice Management Software
Fakturama is an open-source software solution designed for enterprises for creating invoices, as well as delivery notes, while managing and editing your online web shop. Fakturama was especially created in order to provide a comprehensive invoicing program that is compatible with office suites used worldwide, like LibreOffice and Apache OpenOffice. Fakturama makes it easy to create invoices, manage products, contacts, documents, payments, shippings, VATs and all the other constituents of a web shop. -
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Dolibarr timesheet
Timesheet module for dolibarr
Module to enable a Timesheet view for project in Dolibarr Dolibarr on Sourceforge : https://sourceforge.net/projects/dolibarr/ -
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Excel Invoice
Excel Invoice windows desktop app template
The Invoice template enables you to manage your client details, Product/Service details, Multiples V.A.T rates and Discounts. Besides making Invoices, it will generate a summary of your debtors/accounts receivable and you can also generate Account Statements for your clients. -
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Mutasyon
Mutasyon is a script can add customer, products, inventory or invoice
Mutasyon is write with PHP, Smarty, HTML, CSS and JQuery. We can create customer, invoice and products with it and tracking money which input or output. Mutasyon can; 1) Add customer, 2) Create invoice, 3) Add product and product images, 4) See invoice detail and print invoice 5) See product detail, amount, price, tax and profit 6) See money input and output history. And its support multi language and template. Note! Please if you see any problem tell me. Thanks -
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Free Invoicing Software for 2025
Simple Invoicing program for Desktop written in vba and Access
This is a learning/sample/functional Invoicing program written in vba and MS-Access. It is for a small, or personal, business. It should give you practice in learning/use of Invoicing, and installing on the desktop, and programming in vba and MS-Access. Note that the free MS-Access Runtime is with the download . You need MS-Access if you want to work with the program code or print reports (part of Office 365). The program processes Invoicing and Quotes, and produces reports for A/R, Inventory and Accounting Purposes. Read the readme file, and manual for greatest use of this App. This is an upgrade to MSFrnd2a. The application can now produce a Revenue Graph, you can add Inventory on the Invoice, and print mail labels. The MS-Access Runtimes for 32/64 bits are included. The ZIP file contains all program code, and program elements needed to work on. Find other free programs at: https://gotomarcus.com/main/marcus/index.php or gotomarcus.com/currentswms/index.php -
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Accounting lite
An accounting program (not released) and a released invoice program.
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Open source software for managing silent auctions for charity organizations, etc. This handles printing and tracking all item sheets, and uses a simple database to tracker bids and create invoices at the end of the auction in minutes!
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EasyInvoice
Create and print simple invoices
Create simple invoices and print or store them as PDF in a nice layout with an open source application which runs OS independent (if Java is installed on your machine) For new versions please look at: https://github.com/cpo1964/easyInvoice -
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Factura Simple is an easy software to create invoices, it is a database created in MS-Access 2000 that include a customer and products/services catalog, you can change the format of the invoice and print a daily invoice report.
