Super simple PDF invoicing
- pdf-invoice
- invoice-pdf
- pdf-generation
- prawn
Repository Index
77,852 visible repositories in the index
145–168 of 221 · Most stars
OpenBudgeteer is a budgeting app based on the Bucket Budgeting Principle
- self-hosted
- csharp
- blazor
- budgeting
Modern & private time tracking for macOS & Windows. No cloud, no registration, no paywall. Just download and track your work hours 100% offline.
- macos
- timer
- windows
- desktop-app
The JavaScript library for ExtensionPay.com — payments for your browser extensions, no server needed.
- payments
- javascript-library
- monetization
- chrome-extension
monetr is a budgeting application focused on planning for recurring expenses.
Python live trade execution library with zipline interface.
- python3
- python
- algorithmic-trading
- quant
Create your Java crypto trading bot in minutes. Our Spring boot starter takes care of exchange connections, accounts, orders, trades, and positions so you can focus on building your strategies.
- trading-bot
- trading-strategies
- trading
- bot
QuantJourney Backtester
- backtester
- backtester-python
- backtesting
- strategies
Double-entry accounting & ERP for the web
- postgresql
- accounting
- billing
- web-app
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.
- ach
- automated-clearing-house
- money
- golang-library
Oracle3: open-source trading engine and MCP server for prediction markets. Finds fee-adjusted no-arbitrage violations across related event contracts and trades them live on Kalshi, Polymarket and Solana, or on paper, under pre-trade risk limits. 13 MCP tools, JSON CLI, agent skills, 600+ tests.
- algorithmic-trading
- kalshi
- polymarket
- python
Matching Engine for Limit Order Book in Golang
- exchange
- trading
- orderbook
- execution-engine
Hyperliquid trading desk for AI agents: 7 roles, 17 skills and keyless market tools. Research first; execution requires your API wallet and approved tickets. Grok Bot, Claude Code, Cursor, Codex, Gemini CLI and Grok Build.
- agent-skills
- defi
- grok-bot
- hyperliquid
Free invoice builder & GST billing software for India. Make GST invoices, quotations, bills of supply and credit notes as PDF; GSTR-1/3B reports. Free invoice maker for shops, freelancers & small businesses. Free Tally alternative: open source, 100% offline, no signup, no limits.
- gst
- billing-software-open-source
- gst-billing
- hsn-code
A composable, real time, market data and trade execution toolkit. Built with Elixir, runs on the Erlang virtual machine
- trading
- trading-bot
- trading-systems
- cryptocurrency
Open source Farm management Information System (FMIS) - Connecting farms to the world
- ruby
- agriculture
- erp
- management
SDK for growing mobile in-app purchases
- ios
- purchases
- iap
- sdk
Predicts how news-driven supply-chain shocks ripple across S&P 500 stocks, with an event-study backtest and a hash-chained public prediction ledger. Built on MIT open-source SEC supply-graph code.
- cloudflare-workers
- d3
- event-study
- finance
Predicting price trends in cryptomarkets using an lstm-RNN for the use of a trading bot
- btc
- lstm
- rnn
- bitcoin
TranslatedTuraIDC - Next-generation IDC cloud service management & billing system. 图拉云 (Tula Cloud) business/finance system — a new-generation IDC cloud service operations system
Self-hosted, non-custodial stablecoin payment gateway with x402 and invoice checkout. Accepts USDC, USDT, PYUSD and DAI across 8 networks with QR payments, payment links, settlement tracking and signed webhooks. REST API, micropayments, exports, zero platform fees and no KYC. Python, cross-platform.
- coinbase-x402
- coinpayments-api
- crypto-checkout-form
- crypto-payment-system
Self-hosted restaurant POS with tables, kitchen display, reservations, QR ordering, loyalty and local-network operation.
- casaos
- docker
- gst
- india
Group Office groupware and CRM
- groupware
- crm
- collaboration
Lightweight Bitcoin payment processor written in easily deployable Python. Self custody donations and payments on-chain & Lightning network, directly connected to your own Bitcoin node! No middleman/custodian.
- bitcoin
- bitcoin-payments
- donation-button
- woocommerce