Showing 104 open source projects for "payments"

View related business solutions
  • Paessler: Easy to Use With Enterprise Power. Free Trial Icon
    Paessler: Easy to Use With Enterprise Power. Free Trial

    A low-code dashboard makes monitoring intuitive for any admin, while scripting and custom sensors give experts full control.

    You shouldn't have to choose between a monitoring tool that's easy to use and one that's powerful enough for a complex environment. PRTG's low-code interface lets any admin build dashboards, set alerts and monitor devices without scripting, while custom sensors and full API access are there when your team needs deeper control. One platform, no compromise. Download a free 30-day trial now.
    Get Free Download
  • $300 Free Credits to Build on Google Cloud Icon
    $300 Free Credits to Build on Google Cloud

    New customers can spin up VMs, build with AI, and query data at no cost.

    Put your $300 in credit toward real workloads, then keep building with free monthly usage for 20+ products. No commitment and no charge until you upgrade.
    Start Free
  • 1
    Invoice Ninja

    Invoice Ninja

    Free and Open Source Invoicing, Expenses & Time-Tracking

    ...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.
    Downloads: 16 This Week
    Last Update:
    See Project
  • 2
    SolidInvoice

    SolidInvoice

    Simple and elegant invoicing solution

    ...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. It also supports multiple currencies. SolidInvoice has a powerful and flexible RESTful API so you can easily integrate it to any other service.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 3
    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, standard financial reports and other great features. It's inherently portable and secure, as your data is never uploaded into the Cloud.
    Downloads: 54 This Week
    Last Update:
    See Project
  • 4
    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: 0 This Week
    Last Update:
    See Project
  • Build Agents and Models on One Platform Icon
    Build Agents and Models on One Platform

    Everything you need to build production-ready agents and models. Access 200+ Google and third-party AI models and tools.

    Gemini Enterprise Agent Platform is Google Cloud's comprehensive platform for developers to build, scale, govern, and optimize agents and models. Choose from Google's most advanced models and third-party models like Anthropic's Claude Model Family.
    Start Free
  • 5
    Gumroad

    Gumroad

    Sell stuff and see what sticks

    ...The codebase demonstrates practical patterns for multi-tenant architecture, permissions, testing, and asynchronous processing at scale. For engineers, it’s both a working marketplace and a study in how to balance flexibility for creators with reliability in payments and delivery.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 6
    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: 20 This Week
    Last Update:
    See Project
  • 7
    Personal Management System

    Personal Management System

    Your web application for managing personal data

    ...Anyone with development knowledge can pretty much write their own extensions for personal needs. Keep a track of your personal goals. You can use tools to keep track of your goals progress or use the payments submodule to keep an eye of the money amount that you want to collect for something. Add any personal note to the desired category. Here, you can keep any small information that you need; it can be either quick notes from phone calls, a bunch of information collected all around different pages, or some links to things that you want to check somewhere later in the future.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    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: 8 This Week
    Last Update:
    See Project
  • 9
    Universal Commerce Protocol (UCP)

    Universal Commerce Protocol (UCP)

    The common language for platforms, agents and businesses.

    ...Its modular, capability-based architecture allows businesses to expose only what they support while remaining flexible and extensible. By leveraging existing industry standards for payments, identity, and security, UCP avoids reinventing the wheel while ensuring reliability and trust. The result is a developer-friendly, future-ready protocol that simplifies commerce integration at global scale.
    Downloads: 1 This Week
    Last Update:
    See Project
  • Host LLMs in Production With On-Demand GPUs Icon
    Host LLMs in Production With On-Demand GPUs

    NVIDIA L4 GPUs. 5-second cold starts. Scale to zero when idle.

    Deploy your model, get an endpoint, pay only for compute time. No GPU provisioning or infrastructure management required.
    Start Free
  • 10
    WooCommerce

    WooCommerce

    An open source eCommerce plugin for WordPress

    WooCommerce is a customizable, open-source eCommerce platform built on WordPress. Get started quickly and make your way. Add the WooCommerce plugin to any WordPress site and set up a new store in minutes. Get secure payments, configurable shipping options, and more, out of the box, for free. From subscriptions to gym classes to luxury cars, WooCommerce is fully customizable. Add features and extend the functionality of your store with official extensions from the WooCommerce Marketplace. Manage your business on the go with the WooCommerce Mobile App. ...
    Downloads: 16 This Week
    Last Update:
    See Project
  • 11
    Medusa.js

    Medusa.js

    The world's most flexible commerce platform

    Medusa is an open‑source, modular commerce platform that provides foundational commerce logic and tools—like product management, orders, payment flows—as a framework. It's designed for developers to build custom, scalable e‑commerce applications such as B2B, DTC stores, marketplaces, point-of-sale systems, and service businesses without reinventing core functionality. Medusa is a commerce platform with a built-in framework for customization that allows you to build custom commerce...
    Downloads: 5 This Week
    Last Update:
    See Project
  • 12
    FOSSBilling

    FOSSBilling

    Empower your hosting business with FOSSBilling

    FOSSBilling is a free and open-source billing and client management solution tailored for online services businesses, particularly those in the web hosting space. It delivers a suite of tools that automate the creation and delivery of invoices, track payments, manage customer accounts, and handle service provisioning, all from a centralized web interface. Because it’s self-hosted and licensed under the Apache 2.0 license, organizations have full control over their data and can customize or extend the system to fit unique workflows or branding requirements. FOSSBilling supports integration with numerous control panels and payment gateways, helping businesses automate domain management, hosting account creation, and customer notifications without manual intervention. ...
    Downloads: 1 This Week
    Last Update:
    See Project
  • 13
    Documenso

    Documenso

    The Open Source DocuSign Alternative

    ...Receive your personal link to share with everyone you care about. Easily embed Documenso into your product. Simply copy and paste our react widget into your application. Integrated payments with Stripe so you don’t have to worry about getting paid.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 14
    The XRP Ledger

    The XRP Ledger

    A decentralized cryptographic ledger

    ...XRP is faster, less costly and more scalable than any other digital asset today, and is currently being used by the company Ripple to build technology that can transform global payments. Learn more on https://ripple.com/xrp
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    Liberapay

    Liberapay

    Source code of the recurrent donations platform Liberapay

    Liberapay is an open-source platform designed to facilitate recurring donations to creators, developers, and projects, with a strong emphasis on transparency, privacy, and sustainability. It operates as a nonprofit service that allows users to financially support individuals or teams on a weekly, monthly, or yearly basis without expecting rewards in return. The platform is particularly focused on funding open-source software, free knowledge, and creative work, helping contributors maintain...
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    Osmedeus Core Engine

    Osmedeus Core Engine

    A Workflow Engine for Offensive Security

    Osmedeus is a Workflow Engine for Offensive Security that allows you to build and run a reconnaissance system on a wide range of targets, including domains, URLs, CIDRs, and GitHub repositories. It was designed to establish a strong foundation and has the ability to adapt and function automatically in order to perform reconnaissance tasks. Designed to build a foundation with the capability and flexibility that allow you to run your reconnaissance system automatically. Osmedeus is a Workflow...
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    Aimeos Laravel ecommerce package

    Aimeos Laravel ecommerce package

    Laravel ecommerce package for ultra fast online shops

    ...Performance is a core focus: the platform is engineered for extremely fast response times, and it can scale to billions of items, making it suitable for high-traffic, enterprise deployments. Feature-wise, it covers a broad range of product types (bundles, vouchers, virtual, configurable, event products), subscription handling with recurring payments.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 18
    acback accounting system

    acback accounting system

    Online accounting system

    Acback accounting system, online vouchers, payments, receipts, invoices, reports, data management, inventory, multiple users, permissions, data backup, linked reports...
    Downloads: 20 This Week
    Last Update:
    See Project
  • 19
    Mifos - Open Source Core Banking

    Mifos - Open Source Core Banking

    Democratizing Financial Services Worldwide

    ...Mifos X acts as the reference web and mobile apps for staff and customers providing an out of the box ready-to-deploy solution on top of Apache Fineract along with reporting, payments orchestration and other ancillary solutions. More than 20 million customers are reached by 400+ institutions using the Mifos and Fineract APIs. The back-end has the customer management, wallet/account management, loan and deposit management, general ledger, and reporting services to provide a full range of digital financial services. ...
    Leader badge
    Downloads: 70 This Week
    Last Update:
    See Project
  • 20
    webTareas

    webTareas

    A WebBased Collaboration OpenSource Tool

    Leader badge
    Downloads: 14 This Week
    Last Update:
    See Project
  • 21
    Gestinux

    Gestinux

    Accounting and billing software

    Accounting and billing application, developed using LAZARUS, for Linux and Windows. Local executable, quick and easy to install. Can create and use local or remote MySql, MariaDb or PostgreSql databases. English, French, Spanish and Italian translations. Ready to be translated by non IT specialists, using a translation module included.
    Leader badge
    Downloads: 4 This Week
    Last Update:
    See Project
  • 22
    suntecorb

    suntecorb

    Suntecorb unifies solar design, shop, installer booking & powerdiscuss

    Suntecorb is a solar operating platform for people and businesses that want to design, shop, install, and discuss solar systems with fewer mistakes. The platform starts with PowerLoad, an appliance-based design flow that helps users estimate load, select suitable panels, batteries, inverters, mounting, and accessories, and generate clearer solar project expectations before payment or installation. Suntecorb also includes a solar shop, installer booking, installer KYC, workorder...
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    Cash Flow

    Cash Flow

    Personal finance app to keep track of cash, income, expense and budget

    Cash Flow is a simple personal finance app that keeps track of your monthly income and expense by categories. You can add reminders of upcoming credit card payments. View your account balances at a glance to quickly make sure you have enough money in each account. Start with as little as one month of transactions from a bank. Cash Flow supports checking, savings, credit cards, and cash expense accounts. Cash Flow stores data in text files. The fields in a transaction are colorized by a built-in text editor. ...
    Downloads: 3 This Week
    Last Update:
    See Project
  • 24
    MoneyCSV

    MoneyCSV

    Personal finance transaction tracker similar to the obsolete MS Money

    This personal finance program allows you track all personal accounts including investment accounts. Money CSV provides reoccurring bills, budget tracking, report generation, net worth tracking and custom transaction import rules. The program supports importing of downloaded transaction files (CSV, OFX, QFX and QIF). Money CSV supports stock price updates if you get a key for the Yahoo Finance (YH Finance) API from RapidAPI.com. The intro level API key is free, and you get 500 downloads per...
    Leader badge
    Downloads: 5 This Week
    Last Update:
    See Project
  • 25
    Custom Billing Server

    Custom Billing Server

    Linux-Based Billing And Business Application Server For FREE use.

    Do you offer services or tangible products that can not be scanned for invoicing? Are you still creating your invoices and quotes on paper, or via Word/Excel etc? They say in business that, TIME IS MONEY! So why spend a lot of time creating invoices or estimates, when you can use a suitable tool to manage your clients, products, services or subscriptions, create professional-looking invoices or estimates, and print or email them within seconds? The Custom Billing Server includes...
    Leader badge
    Downloads: 3 This Week
    Last Update:
    See Project
  • Previous
  • You're on page 1
  • 2
  • 3
  • 4
  • 5
  • Next