Ocular

Ocular is a lightweight, self-hosted billing and invoicing application designed for small businesses, freelancers, and solo operators who want to manage their finances without handing over data to a third-party service. It focuses on core billing tasks like sending invoices, tracking payments, and managing clients. Everything runs on your own server, giving you full control over your financial records.

Built using modern web technologies (including Vue.js and a Node.js backend), Ocular supports multiple currencies, customizable invoice templates, and PDF generation for professional-looking documents. It can integrate with common payment gateways to simplify payment collection. The platform is currently in active development, with a focus on simplicity over feature bloat.

Ocular is open source under the MIT license, making it free to use and modify. It is best suited for users comfortable with basic server setup, as there is no managed cloud version. The project is maintained by Simon Wep and the open source community, and its straightforward approach appeals to those who prefer a no-frills billing tool.