Serverless Invoices is a free tool for invoice generating and management - no signup needed. Truly serverless, your data is safe with you in your browser. Export/import your invoices. It's open source, easy to modify, easy to deploy.
Invoice Maker is a comprehensive solution for creating invoices, estimates, reports, receiving payments, and running a business. Thanks to it, you can create forms, fill out templates, send paperwork to clients, and accept payments wherever you are.