Showing 163 open source projects for "invoicing"

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  • 1
    Invoice Ninja

    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.
    Downloads: 12 This Week
    Last Update:
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  • 2
    Dolibarr

    Dolibarr

    Dolibarr ERP CRM is a modern software package to manage your company

    Dolibarr is an open-source ERP (Enterprise Resource Planning) and CRM (Customer Relationship Management) software designed for small to medium-sized businesses. It includes a suite of features for managing a company’s operations, including invoicing, project management, inventory, and HR. Dolibarr is highly modular, meaning users can activate only the features they need, making it scalable and adaptable for different business models.
    Downloads: 33 This Week
    Last Update:
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  • 3
    SolidInvoice

    SolidInvoice

    Simple and elegant invoicing solution

    SolidInvoice is a simple open source general billing manager/ invoicing application made for small businesses and freelancers. It helps you manage clients, contacts, day-to-day billing and more so you can always get paid right and on time. SolidInvoice is capable of handling recurring invoices, quotes and estimates, as well as online payments. You can receive payments from a number of different gateways such as Paypal Express, Stripe Checkout, Be2bill and more.
    Downloads: 16 This Week
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  • 4
    Meteroid

    Meteroid

    Open-source pricing and billing infrastructure

    ...The system is written in Rust, emphasizing performance, reliability, and safety, making it suitable for production use in small startups up to large enterprises. Meteroid handles complexities like plan versioning, usage-based billing, re-invoicing, grandfathering of plans, experiments, and cost limiting — giving teams a robust billing backend without building one from scratch.
    Downloads: 7 This Week
    Last Update:
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  • 5
    OpenMeter

    OpenMeter

    Metering and Billing for AI, API and DevOps

    ...It supports high-scale event ingestion and deduplication to accurately record how customers consume billable resources such as API calls, compute time, or storage, and then correlates that usage with payment systems and billing plans to automate invoicing and revenue recognition. The system includes metering, storage, cataloging of products and pricing rules, and tools to enforce limits or quotas, supporting both self-service customer portals and internal dashboards. OpenMeter integrates with payment processors, CRMs, and analytics systems, letting teams launch complex pricing models or subscription tiers without heavy custom engineering work.
    Downloads: 12 This Week
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  • 6
    InvoicePrinter

    InvoicePrinter

    Super simple PDF invoicing

    Super simple PDF invoicing. InvoicePrinter is a server, command line program and pure Ruby library to generate PDF invoices in no time. You can use Ruby or JSON as the invoice representation to build the final PDF.
    Downloads: 3 This Week
    Last Update:
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  • 7
    Stripe Ruby Library

    Stripe Ruby Library

    Ruby library for the Stripe API

    A Ruby library that enables developers to integrate Stripe’s payment gateway into Ruby applications, streamlining billing, payments, and customer management.
    Downloads: 6 This Week
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  • 8
    Kaneo

    Kaneo

    An open source project management platform

    Kaneo is a lightweight invoicing and client management tool for freelancers and small businesses. Built as a modern, self-hosted solution, Kaneo helps users generate invoices, track payments, and manage clients from a user-friendly dashboard. It's especially useful for independent workers who prefer local control over SaaS options.
    Downloads: 8 This Week
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  • 9
    Frappe Books

    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,...
    Downloads: 69 This Week
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  • 10
    Ever Gauzy

    Ever Gauzy

    Open Business Management Platform

    Ever Gauzy is an open-source business management platform that includes time tracking, human resource management, project monitoring, and productivity analytics. It’s designed for remote teams and enterprises looking to streamline operations while keeping full control over their data. Gauzy supports both cloud and self-hosted deployment options.
    Downloads: 10 This Week
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  • 11
    Invoice Plane

    Invoice Plane

    A self-hosted open source application for managing your invoices

    InvoicePlane is an open-source invoicing and client management system designed for small businesses and freelancers. It enables users to create, send, and manage invoices and quotes efficiently. The system supports multiple languages, currencies, and tax rates, making it suitable for global use. InvoicePlane also provides detailed financial reporting and client management features.
    Downloads: 7 This Week
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  • 12
    Free Invoicing Software for 2025

    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).
    Downloads: 6 This Week
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  • 13
    Free Invoicing Software for Auto Shops

    Free Invoicing Software for Auto Shops

    An Invoicing program for Auto Shops written in vba and MS-Access.

    This is an sample/learning/functional Invoicing program written in vba and MS-Access. It is for a small, or personal, Auto Repair type 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).
    Downloads: 3 This Week
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  • 14
    ClawHost

    ClawHost

    Deploy OpenClaw with one click

    ...ClawHost supports automatic domain and subdomain management through Cloudflare integration and uses services like Hetzner for cloud provisioning, making it scalable across geographies. With built-in billing support via integrations like Polar.sh, users can manage subscriptions and invoicing directly from the platform, enabling it to serve both personal projects and small business use cases.
    Downloads: 9 This Week
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  • 15

    Offline Hospital Management System Free

    Hospital Management System download Software to Get it

    ...Enhanced Patient Care: Streamlined processes lead to improved patient care and satisfaction. Operational Efficiency: Automation reduces manual tasks, minimizing errors and improving efficiency. Financial Accuracy: Accurate billing and invoicing contribute to better financial management. Data-Driven Decision Making: Comprehensive reporting and analytics empower administrators to make informed decisions. Support : https://www.plugin999.com/support/ Medical Billing Software : https://sourceforge.net/projects/offline-medical-billing/
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    Downloads: 60 This Week
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  • 16

    Offline Medical Billing Software Free

    Offline Medical Billing Software to Print Your Medical Bill

    ...Designed to cater to the unique needs of healthcare providers, this software offers comprehensive features without the hassle of constant internet connectivity. Efficiently manage patient billing information, insurance claims, and invoicing without worrying about online interruptions. Our user-friendly interface makes it easy for medical professionals and administrative staff to navigate through various functions, ensuring smooth operations and timely payments. Support : https://www.plugin999.com/support/
    Downloads: 14 This Week
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  • 17
    billing-animal-hospital

    billing-animal-hospital

    Demo Invoicing APP for Veterinarian Medical Office

    This is an sample Invoicing program written in vba and MS-Access. It is for a small, or personal, Vets Medical Office. 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).
    Downloads: 0 This Week
    Last Update:
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  • 18
    Akaunting

    Akaunting

    Free and Online Accounting Software

    From invoicing to expense tracking to accounting, Akaunting has all the tools you need to manage your money online, for free. That's right, completely free. There is no limited or trial version. No hidden charges or setup fees. See your financials online anytime, anywhere on your computer, tablet or phone. We're disrupting the closed-source dominated market and introducing the power of Open Source to accounting world.
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    Downloads: 31 This Week
    Last Update:
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  • 19
    Dolibarr ERP - CRM

    Dolibarr ERP - CRM

    Open source ERP and CRM web software for business

    Dolibarr ERP - CRM is an easy to use ERP and CRM open source software package (run with a web php server or as standalone software) for businesses, foundations or freelancers (prospect, invoicing, inventory, warehouse, order, shipment, POS, members for foundations, bank accounts...). Dolibarr is also available with auto-installers for users with no technical knowledge to install Dolibarr and all its prerequisites (Apache, Mysql, PHP) with just one package. Available platforms for such packages are: Windows, Debian, Ubuntu, Mint, Redhat, Fedora, OpenSuse, Mandriva, Mageia. ...
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    Downloads: 5,245 This Week
    Last Update:
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  • 20
    Odoo

    Odoo

    Open-source business management software

    Odoo 18 is a comprehensive open-source business management software that offers a suite of integrated applications to streamline various organizational processes. Designed for flexibility and scalability, it provides tools for managing functions like sales, inventory, accounting, human resources, and customer relationships. Odoo's modular structure allows businesses to adopt only the features they need while maintaining the option to expand functionality as they grow. The open-source version...
    Downloads: 64 This Week
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  • 21
    ...Please try the online demo at www.bambooinvoice.net/bambooinvoice User: info@bambooinvoice.net Password: password You are in control. BambooInvoice sits on your server. Its your data. You never need to trust your invoicing data to anyone else, and you can get it out of the system easily. BambooInvoice is easy to use, and easy on the eyes. BambooInvoice is actively used and developed. BambooInvoice is built atop modern coding standards. BambooInvoice is internationalized. Currently it is available in English, French, German, Dutch, Romanian, Spanish, Portuguese, Bulgarian, Swedish, Italian, and Estonian and more. ...
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    Downloads: 5 This Week
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  • 22
    Invoiso

    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.
    Downloads: 63 This Week
    Last Update:
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  • 23
    ABillS (~AsmodeuS~ Billing System)

    ABillS (~AsmodeuS~ Billing System)

    Triplay ISP billing system internet voip iptv hotspot

    ABillS - ISP Billing System with different abilities. IPoE,PPPoE, PPTP, L2TP, IPSec,OpenVPN (Cisco, Junipex MX, ZTE, accel-ppp, mikrotik) Support RADIUS (Freeradius) PON (BDCOM,ZTE,C-Data,Huawai,V-Solutions,Stels) CRM for ISP, Callcenter, NetFlow, Monitoring, VoIP (GNU gatekeeper, Asterisk), IPTV, Hotspot (Mikrotik, DD-wrt), SNMP Monitoring (D-Link, Cisco), Help Desk, Mail management (Postfix, Spamassassin, Courier IMAP/POP). Multilanguage
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    Downloads: 22 This Week
    Last Update:
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  • 24
    Clicks`n`Bricks

    Clicks`n`Bricks

    Cloud based program for POS, CRM, Inventory, Workorders, Services

    ...Because of it's CRM element, this program works well for any customer-centric business such as Retailers, Service Providers and other businesses needing workorders and invoicing. Program editions contained in the distribution file include Retail, Wholesale, Inventory Control and Service. Users may select the edition that works best for their business. If a hosted version of the program would be preferred, please see our hosting company web page at https://clicksnbricks.net
    Downloads: 1 This Week
    Last Update:
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  • 25

    WTERP

    Factional modular: CRM, SD,MM,WM,HR, Workflo and System configuration.

    ...It is using a Client/Server structure and runs with a Windows platform and web server on the internal network or visit web services from the internet. The data are encrypted in the transfer that guarantees safety. The foundational are included in CRM, SD, MM, WM, HR, Reporting (prospect, invoicing, inventory, warehouse, order, shipment, POS, members for foundations, bank accounts...). WTERP is an easy installer on the PC for users with no technical knowledge with just one package to install for the Windows platform. But Database can install on servers and its prerequisites (C#/.net Web Service, SQL Server)
    Downloads: 1 This Week
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