Build and launch your own small-business management SaaS without starting from scratch. This white-label source-code package provides the foundation for an all-in-one business management platform designed for freelancers, professional service providers, product-based businesses, and hybrid businesses. Instead of forcing every user into the same workflow, the application adapts during onboarding. Users can choose between Freelance / Professional Services and Small Business, while product-based, service-based, and hybrid businesses can enable the tools relevant to their operations. Core Features Professional quotes and estimates Quote-to-invoice conversion Invoice creation and management Tax calculations Custom tax rates and labels Inclusive and exclusive tax support Client/customer management Products and services Inventory and stock tracking Low-stock monitoring Calendar and scheduling Payment recording Partial and full payments Payment receipts Expense tracking Financial reporting dashboard Revenue and receivables reporting Tax reporting Product and client performance CSV report export Print/PDF-ready business documents Light, Dark, and System appearance modes Adaptive business onboarding Modular workspace configuration Built for Different Types of Businesses The application automatically adapts its workspace according to the user's business. Freelancers & Professional Services Clients, Services, Calendar, Quotes, Invoices, Payments, Expenses and Reports. Product-Based Businesses Customers, Products, Inventory, Quotes, Invoices, Payments, Expenses and Reports. Product + Service Businesses Use Inventory and Calendar together while selling physical products and professional services on the same platform. This makes the code suitable for many potential SaaS niches, including consultants, designers, photographers, agencies, contractors, repair businesses, salons, retailers, small shops and other service or product-based businesses. White-Label Ready The source code was designed so buyers can build their own brand on top of it. Brand settings are centralized and can be changed without searching through the entire application. Customize: Application name Short brand name Tagline Support email Website Primary brand color Business settings Currency Tax configuration Enabled modules Launch the software using your own branding and domain. SaaS-Ready Architecture Unlike a simple HTML invoice template, this package includes a working application backend. Technology includes: Node.js JavaScript HTML5 CSS3 SQLite REST-style API Authentication and sessions Database-backed business data Responsive web interface The application runs locally through the included Node server and provides a foundation that can be extended for cloud deployment. Business Reports Give business owners a clearer picture of their operations. The reporting module includes metrics such as: Revenue Track invoiced revenue and collected payments. Accounts Receivable See how much customers still owe. Expenses Monitor business spending. Tax Track tax charged through invoices. Inventory Monitor stock levels and inventory-related activity. Customer Performance Identify valuable customers and sales activity. Quote Conversion Monitor quotes and conversion into invoices. Reports can also be exported for additional analysis. Inventory Management Product-based businesses can maintain their product catalog and inventory information, including: SKU Product name Category Cost Selling price Tax status Quantity Reorder level Supplier Stock adjustments Inventory can be connected with the invoicing workflow so stock activity reflects product sales. Scheduling & Calendar Service professionals can manage business activities from the same platform. Calendar functionality is designed for: Appointments Client meetings Jobs Project deadlines Invoice due dates Quote expiration dates Business reminders This allows service businesses to manage both their financial workflow and their schedule from one application. Professional Document Workflow Create a quote, assign a customer, add products or services, calculate discounts and taxes, and issue the document. Accepted quotes can then move directly into the invoicing workflow without re-entering the same information. Payments can subsequently be recorded against invoices and reflected in business reports. The intended workflow is: Customer → Quote → Invoice → Payment → Receipt → Reports Commercial White-Label License Included The package includes a commercial white-label license. The intended license allows a buyer to customize and rebrand the source code and operate a commercial SaaS/end product based on it. The source code itself may not be redistributed or resold as another source-code product under the standard license. A LICENSE.md file is included with the package. What Buyers Receive The download contains: Complete source code Frontend application Node.js backend SQLite database setup Authentication system Business onboarding Quotes and invoices Clients Inventory Calendar Payments Expenses Reports White-label configuration Commercial license Installation instructions White-label customization guide Production roadmap Installation Requirements: Node.js 22.5+ After extracting the package: npm start Then access the application through the local web server. Detailed installation instructions are included in the documentation. Who Is This Code For? This source code is suitable for: SaaS entrepreneurs Developers Freelancers Agencies Startup founders Small-business software developers Entrepreneurs building niche SaaS products Developers creating client-specific business systems Use the platform as a starting point and customize it for your own target market. Important Production Note This package provides a functional SaaS foundation and full source code, but buyers planning a large-scale public production deployment should implement production infrastructure appropriate to their requirements. Depending on the deployment, this may include PostgreSQL, production email delivery, cloud storage, backups, subscription billing, server-generated PDFs, monitoring, security hardening and deployment infrastructure. I would keep that disclosure in the listing. It makes the product sound more credible, not less. We should never advertise the current package as a fully hosted enterprise-ready SaaS when what we're selling is a strong SaaS source-code foundation.