InvoicePlane

An open source web application meant to help manage and create invoices in a simple, straightforward way. It does only one thing, but does it very well. Everything is placed where you are expecting to find it. Manage invoices with different serial numbers. Save drafts of your invoices and continue editing them later. Obtain printable PDF versions of the invoices, with a professional look. Automatically generate invoices on a periodic basis. Bill from any internet connection-enabled place. Manage customers and invoices programmatically directly from your application. It has a growing community of developers continuously working on new features.

Rompslomp is the simple accounting program specially designed for entrepreneurs / self-employed workers / freelancers who prefer to do business. Rompslomp aims to make online accounting as easy as possible for you, this saves you a lot of time! Effort is not a traditional administration program, it works much easier than other accounting software, especially for self-employed persons / one-man businesses, but BVs, (sports) associations and foundations also do their accounting with Effort. At Rompslomp you don't have to deal with general ledger accounts and other accounting terms, we do this for you. Create an invoice with your own logo that will immediately be processed in your accounting, or scan your receipt with our Android or iPhone / iPad app and put it in the "shoe box", after which you have to do it in an instant if you have to submit your VAT return processed. In addition to the fact that it always works on your laptop, it is also available as an Android and iPhone.