Paid vs. Free subcategories
frappe/erpnext
A complete free business management system covering accounting, stock, orders, assets and projects.
btcpayserver/btcpayserver
Payment software you run yourself that takes Bitcoin into a wallet whose keys you hold.
hledgerorg/hledger
Double-entry accounting over plain text files, with command-line, terminal, web and editor interfaces.
lballabio/QuantLib
The long-established free library for pricing and risk-managing financial instruments.
akaunting/akaunting
Self-hosted invoicing and expense tracking, with the double-entry accounting sold separately as an add-on.
ledger/ledger
Double-entry accounting from a plain text file, run from the command line, with no database of any kind.
spiral-project/ihatemoney 💎 hidden gem
A shared-expense list that works out the shortest set of payments to make everyone even.
InvoicePlane/InvoicePlane
Self-hosted invoices, quotes, clients and payment tracking, under an MIT licence.
ledgersmb/LedgerSMB 💎 hidden gem
Self-hosted double-entry accounting with ordering, invoicing, stock and timecards.
paymenter/paymenter 💎 hidden gem
A self-installed shop, invoicing and renewal system for selling a service people pay for every month.
FOSSBilling/FOSSBilling 💎 hidden gem
Self-hosted recurring billing, invoicing and customer accounts for a small service business, and the only maintained open-source option of its kind.
InvoiceNinja/invoiceninja
Quotes, invoices, payments, projects and time tracking in one application you install, under a licence that forbids reselling it as a service.
beancount/beancount
Double-entry bookkeeping written as a plain text file, with a command-line program that checks it and reports on it.
medusajs/medusa
The order and payment machinery of an online shop, with the customer-facing pages left to you.
moneymanagerex/moneymanagerex 💎 hidden gem
A desktop program for household accounts, budgets and spending, saved in one local file.
ellite/Wallos
A self-hosted tracker for recurring subscriptions, with renewal dates, currencies and totals.
SolidInvoice/SolidInvoice 💎 hidden gem
Self-hosted quoting and invoicing with recurring bills, multiple currencies and card payment.
solidtime-io/solidtime
Self-hosted time tracking for billable work, with clients, projects, rates and reports.
firefly-iii/firefly-iii
A personal finance manager you run yourself, with budgets, categories and reports.
bigcapitalhq/bigcapital
Double-entry business accounting you host yourself, with invoices and financial reports.
spliit-app/spliit 💎 hidden gem
Shared expenses for a group, with no sign-up and an option to host it yourself.
beancount/fava 💎 hidden gem
A website for a plain text accounting file, with balances, charts and filters.
InvoiceShelf/InvoiceShelf 💎 hidden gem
Invoicing and expense tracking you host yourself, with several currencies and customers.
Nixtla/statsforecast
Fast classical forecasting models (ARIMA, ETS, Theta, naive) that give a strategy a floor it has to clear.
openmeterio/openmeter 💎 hidden gem
It counts usage events as they arrive and enforces per-customer allowances in real time.
polarsource/polar
A billing and payment service that becomes the legal seller, so sales tax is its responsibility.
skforecast/skforecast 💎 hidden gem
Time-series forecasting with scikit-learn models, with time-respecting testing built into the core.
activemerchant/active_merchant
Active Merchant is a simple payment abstraction library extracted from Shopify. The aim of the project is to feel natural to Ruby users and to abstract as many parts as possible away from the user to offer a consistent interface across all supported gateways.
AgentaOS/eresidency
Claude Code skill: Guide remote founders through Estonian e-Residency, company formation, banking, and getting paid with stablecoins.
aimeos/aimeos-laravel
Laravel ecommerce package for ultra fast online shops, scalable marketplaces, complex B2B applications and #gigacommerce
AnchitSingh/Better-Call-Saul
Multi-agent AI advisor for business formation strategy. Tax CPA, Attorney, and Strategist agents analyze your situation to recommend entity type, compliance plan, and growth roadmap.
autonnel/autonnel
The open-source, AI-native upgrade to ClickFunnels, build funnels with checkout, upsells & ad attribution.
bagisto/bagisto
Open Source eCommerce & Multi-Vendor Marketplace Platform Built with Laravel for Enterprise-Scale Commerce, Supporting 10M+ SKUs
bitcart/bitcart
Bitcart is a free and open-source self-hosted payment processor for BTC, LTC, BCH, XMR, ETH, TRX, USDT and more
BlueFinchCommerce/module-checkout
An open-source checkout for Magento and Adobe Commerce, built for speed, flexibility, and seamless transactions - without the friction.
cattr-app/server-application
Cattr server application - self-hosted time tracking with project management, reports, screenshots, activity tracking and public API
cboxdk/laravel-nexus
Cbox Nexus — the US economic-nexus engine for Laravel: accumulate a seller's sales per state, detect when a post-Wayfair threshold is crossed, and report where registration is required.
coneshare/coneshare
Add virtual datarooms, secure sharing, document tracking, and workflow automation on top of your storage (Nextcloud, Google Drive, Dropbox). Self-hosted DocSend alternative.
Cubitrek/bazaar-commerce
Open-source multi-vendor marketplace engine for cash-on-delivery markets. Double-entry settlement ledger keyed on courier remittance, anti-RTO order confirmation gate, and an encrypted digital code vault. Built on MedusaJS and Mercur.
Dolibarr/dolibarr
Dolibarr ERP CRM is a modern software package to manage your company or foundation's activity (contacts, suppliers, invoices, orders, stocks, agenda, accounting, ...). it's an open source Web application (written in PHP) designed for businesses of any sizes, foundations and freelancers.
dottaap-star/open-dataroom
AI-powered investor data room. Self-hostable. Pluggable LLM (Gemini/OpenAI/Anthropic). MIT-licensed Next.js template.
DRYTRIX/TimeTracker
Self-hosted time tracking & invoicing for freelancers and teams: timers, projects, PDF and Peppol e-invoicing. Open-source Toggl/Clockify alternative.
dubbl-org/dubbl
A full-featured, open-source alternative to Xero and QuickBooks. It is API-first, developer-friendly, and built for teams that want full control over their financial data.
ejosterberg/open-sales-tax
Open-source US sales tax calculation API. Free, self-hostable, contributor-driven. https://opensalestax.org
ever-co/ever-gauzy
Ever® Gauzy™ - Open Business Management Platform (ERP/CRM/HRM/ATS/PM) - https://gauzy.co
facebook/facebook-for-woocommerce
The official plugin from Meta. This repository is now officially owned by Meta's Partner Engineering team. We welcome and encourage contributions from the community.
facebook/prophet
Tool for producing high quality forecasts for time series data that has multiple seasonality with linear or non-linear growth.
FinAegis/core-banking-prototype-laravel
Open-source core banking platform — 61 DDD domains with event sourcing, CQRS, and a schema-first GraphQL API. Multi-asset accounts, exchange, lending, compliance, x402/MPP machine payments, and a non-custodial wallet backend. Laravel 12 / PHP 8.4. Reference implementation: the GCU basket currency.
flexprice/flexprice
Usage-based pricing and billing for developers 🔓 Cloud or self-hosted ⚙️ No-code UI 💰 Realtime usage metering 🎟 Credits & top-ups 🔑 Control feature access
fluid-checkout/fluid-checkout
Fluid Checkout simplifies and improves the checkout experience on WooCommerce websites for your new and repeating customers with a truly linear, Shopify-like checkout.
gamonoid/icehrm
Manage your employees easily with a robust and efficient Human Resource Management System
google-marketing-solutions/feedx
Transparent, robust and trustworthy A/B experimentation for Shopping feeds.
google-research/timesfm
TimesFM (Time Series Foundation Model) is a pretrained time-series foundation model developed by Google Research for time-series forecasting.
grandnode/grandnode2
Open-source eCommerce platform for C# and ASP.NET Core 10 with MongoDB. Build multi-store shops and multi-vendor marketplaces with B2B/B2C, REST API, plugins, Vue 3 and Docker.
gumruyanzh/raisebook
Free, open-source investor CRM for startup founders: track every investor through every round, with an MCP server for Claude Code, Codex and Cursor.
howieyoung/ir-kit
Run investor relations like you have an IR team of ten. Open-source, local-first IR system for founders: cap table & SAFE math, financial dashboard, investor CRM, update composer, data-room playbooks — built to be operated with your AI agent.
ildrm/madar-investment-operations-platform
Open-source multi-tenant investment management and portfolio accounting platform for funds and asset managers. Supports NAV, double-entry fund accounting, investor onboarding, cash flows, trading, reconciliation, risk controls, fees, statements, audit trails, and investor portal. Built with React, Fastify, PostgreSQL, Docker, Terraform, and AWS.
impress-org/givewp
GiveWP - The #1 Donation Plugin for WordPress. Easily accept donations and fundraise using your WordPress website.
interledger/rafiki
An open-source, comprehensive Interledger service for wallet providers, enabling them to provide Interledger functionality to their users.
invoicerr-app/invoicerr
Invoicerr is a freelance-focused invoicing app that lets you create quotes, generate invoices, track payments, and collect secure signatures.
jhpyle/docassemble
A free, open-source expert system for guided interviews and document assembly, based on Python, YAML, and Markdown.
juspay/hyperswitch-prism
One library | Many payment processors | Scale to multiple processors with few lines of code.
juspay/hyperswitch-web
Hyperswitch Web SDK: A Rescript powered React library for seamless payment integration and customization.
justin-nevins/startup-incorporation-kit
Claude Code skill: Delaware C-Corp incorporation guide for startup founders. Interactive advisor with document templates, cost breakdowns, and compliance tracking.
kirilkirkov/Ecommerce-CodeIgniter-Bootstrap
Responsive, Multi-Vendor, MultiLanguage Online Store Platform (shopping cart solution)
kitokoh/leopardo-hr
Leopardo — the Business OS for field-based companies: HR & payroll, attendance, CRM, accounting, operations. Web, mobile, kiosks. Free business packs for your trade.
kiwoongeom/gmc-mcp
The first free, open-source, self-hosted MCP server for Google Merchant Center (GMC). 126 tools over Merchant API v1 — products, inventory, reports, promotions, returns, account config, audit log + rollback, dry-run. Free alternative to paid SaaS (Adzviser, Catchr, Windsor.ai, Pipedream).
laravel/cashier-stripe
Laravel Cashier provides an expressive, fluent interface to Stripe's subscription billing services.
laravel/vat-calculator
Handle all the hard stuff related to EU MOSS tax/vat regulations, the way it should be.
leonar15/startup-checklist
A checklist for incorporation so you can get back to building your product, fundraising, etc.
mage-os-lab/module-shopping-feed
Product feed generation for Mage-OS and Magento Open Source. Includes Google Shopping, Local Inventory, Promotions, Meta, Microsoft, TikTok, and Pinterest presets, custom mappings, filters, scheduling, FTP/SFTP delivery, and an optional migration companion for Rocket Shopping Feeds.
magento/magento2
Prior to making any Submission(s), you must sign an Adobe Contributor License Agreement, available here at: https://opensource.adobe.com/cla.html. All Submissions you make to Adobe Inc. and its affiliates, assigns and subsidiaries (collectively “Adobe”) are subject to the terms of the Adobe Contributor License Agreement.
mayswind/ezbookkeeping
ezBookkeeping is an open source, powerful, self-hosted personal finance app that is easy to use.
mercurjs/mercur
The complete open source platform to run your entire marketplace. Storefront, vendor panel, admin console, and integrations in one enterprise-grade platform you own.
meteroid-oss/meteroid
Open-source Pricing and Billing Infrastructure 🚀 Subscription management, Invoicing, Pricing, Usage-based billing, Cost limiting, Grandfathering, Experiments, Revenue analytics & Actionable insights
MKBSP/capfolder
Your cap table, in a folder you own. Free, open-source, local-first alternative to Carta and Pulley: SAFEs, options, vesting, e-signatures.
moov-io/ach
ACH implements a reader, writer, and validator for Automated Clearing House (ACH) files. The HTTP server is available in a Docker image and the Go package is available.
mshojaei77/invoice-to-pay-agent
Open-source invoice-to-pay agent for AP automation: OCR/VLM extraction, 3-way matching, approvals, fraud checks, ERP mock posting, evals, and audit logs.
nopSolutions/nopCommerce
ASP.NET Core eCommerce software. nopCommerce is a free and open-source shopping cart.
notrinos/NotrinosERP
A web-based ERP, Accounting system that written in PHP and MySql includes CRM, Sales, Purchasing, Warehousing, Manufacturing, Payroll & Human Resource... It supports multi user, multi currencies, multi languages, multi level approval workflow.
oncesylvia/fundraising-skills
Free, open-source Claude Code skills for founder-led fundraising — find stage/sector-fit investors (researched live, no hallucinated lists), then run cold email, warm intros & cold calls without spam. Bilingual EN/中文 (US + China). Built by a founder raising for Copay (agentic stablecoin payments).
Open-Cap-Stack/opencap
Open-source cap table & equity management platform — free Carta alternative for startups
Open-Cap-Table-Coalition/Open-Cap-Format-OCF
Open Cap Format (OCF) - The Open Source Company Capitalization Data Standard. OCF can be used to structure and track the complex data structures necessary to build and maintain accurate capitalization (cap) tables.
OpenBankProject/OBP-API
An open source RESTful API platform for banks that supports Open Banking, XS2A, PSD2 and Open Finance through access to accounts, transactions, counterparties, payments, entitlements and metadata - plus a host of internal banking and management APIs.
opencollective/opencollective-api
Open Collective's API. A GraphQL API powered by Sequelize and PostgreSQL.
openMF/mifos-mobile
Repository for the Mifos Mobile Banking App for clients. Default Branch for PRs is Dev. Main is for release code and subject to Release Process
Payroll-Engine/PayrollEngine
Open-source framework for regulation-driven payroll applications — multi-tenant, multi-country, API-first, with No-Code/Low-Code automation and test-driven development.
Pitchdrive/investor-update-skill
📬 Write investor updates your investors actually read — a Claude Code skill template for founders, by Pitchdrive
PrestaShop/PrestaShop
PrestaShop is the universal open-source software platform to build your e-commerce solution.
rubyh218/real-estate-asset-management
Claude Code skill for real estate & PE asset management — LP reporting, rent rolls, T-12 analysis, valuations, debt monitoring, hold/sell/refi
run-as-root/Magento-2-Google-Shopping-Feed
A simple and clean Magento 2 Feed Extension for Google Shopping.
RyanAlberts/Keel-AI-Native-Business-Formation
🥇 Ready-to-Run AI agents for start-ups — AI-native from day 0.
saeloun/miru-web
Miru | Time Tracking and Invoicing and Employee Benefits. Built using Ruby On Rails and ReactJS
saleor/storefront
Saleor Storefront built using React, Next.js with App Router, TypeScript, GraphQL, and Tailwind CSS.
sharetribe/web-template
Sharetribe Web Template - starting point to create a client app to your marketplace
shopware/shopware
Shopware 6 is an open commerce platform based on Symfony Framework and Vue and supported by a worldwide community and more than 3.100 community extensions
spillpoint/spillpoint
Open-source exit waterfall engine and dashboard. Reads Open Cap Format, finds every breakpoint, and runs in your browser, so your cap table never leaves your machine.
spree/spree
Open Source Platform for DTC, B2B Commerce, Marketplaces & Omnichannel. REST APIs, TypeScript SDKs, and production-ready Next.js storefront. Self-host it. Own your data. No vendor lock-in. Zero platform fees.
svapnil/iso20022.js
Create ACH, SEPA, FedNow, SWIFT, RTP payment initiations and process bank statements. Used in production to move hundreds of thousands of dollars a month.
teakesdev/corpus-agent-kit
Apache-2.0 Business Formation autopilot + MCP server for US law search — thin clients of corpuslaw.us, with a hash-locked human gate on every filing
tigerbeetle/tigerbeetle
The financial transactions database designed for mission critical safety and performance.
transfer-agent-protocol/tap-cap-table
Onchain cap table management with an offchain SEC transfer agent-compliant DB.
ultrametricai/ultrametric
The open startup repo — everything a founder needs to start and run a company in the agentic era: the comprehensive founder processes from an agentic lens, open documents, situations founders might find themselves in, law that governs the business logic, startup lore, open modules, artifacts and schema.
valeriansaliou/node-sales-tax
:moneybag: International sales tax calculator for Node (offline, but provides optional online VAT number fraud check). Tax rates are kept up-to-date.
vas3k/TaxHacker
Self-hosted AI accounting app. LLM analyzer for receipts, invoices, transactions with custom prompts and categories
VonHoltenCodes/SlowBooks-Pro-2026
Free, source-available accounting: double-entry bookkeeping, invoicing, US payroll, inventory, bank feeds - desktop app with built-in multi-user Server Edition (no Docker needed). A QuickBooks replacement. No cloud, no caps.
vsys-host/shkeeper.io
SHKeeper is a self-hosted and open-source cryptocurrency gateway payment processor. It's integrate with popular CMS, any e-commerce, your own code or product
wc-donation/wc-donation-platform
Donation Platform for WooCommerce unleashes the power of WooCommerce for your online fundraising, crowdfunding & crowdsponsoring
WellApp-ai/Well
No more Sundays on Finance. We build the infrastructure that retrieves, processes, and routes your financial and business data to your FinOps stack, so founders can ship, not spreadsheet.
Wondermove-Inc/saaslens
Open-source SaaS subscription management platform — discover unused subscriptions, match payments to apps, and manage users, seats, and costs.
woocommerce/google-listings-and-ads
Sync your store with Google to list products for free, run paid ads, and track performance straight from your store dashboard.
woocommerce/woocommerce
A customizable, open-source ecommerce platform built on WordPress. Build any commerce solution you can imagine.
zain/capy
Open-source cap table management for founders. Import from Pulley, manage equity, and take your data with you.
Zipstack/unstract
LLM-Driven Extraction of Unstructured Data — Built for API Deployments & ETL Pipeline Workflows
zndr88/LicenseTrack
Free, self-hosted software license management and inventory for tracking licenses, renewals, contracts, costs, vendors, and entitlements.
zonelessdev/zoneless
Open-source Stripe alternative for stablecoins. Checkout, subscriptions, and marketplace payouts. Stripe-compatible API. Your very own payments stack with no fees.
No repository in this area carries every tag you picked.
Get the next edition in your inbox
A dozen repositories, opened and checked. The licence read, the last release dated, and the ones that did not make it named with the reason. It is the half most lists leave out.
No tracking pixels. One click to leave. The archive stays free either way.
We use your address to send the edition and nothing else. Confirm by email, leave in one click. How we handle it.
Suggest a repository
Any public GitHub repository, any size. If it is your own, that is welcome too. We read every suggestion, and some picks are made at random, so stars do not decide. Whatever we pick goes through the same checks as every other entry, and the review is written either way.
Thanks — it is in.
Every suggestion is read. The ones we pick appear in an edition, credited to you if you left a name.