InvoicePro is a production-ready PHP billing system for freelancers and small businesses.

Features:
- Client management
- Invoice + estimate creation
- PDF generation (TCPDF)
- Email invoice to client
- Payment tracking (Razorpay + UPI)
- Expense tracking
- Tax management (GST support)
- Dashboard with charts
- Multi-currency support
- MySQL database
- MVC architecture
- Well documented source code