InvoicePlane is a solid application to manage your complete billing circle: from quotes over invoices to payments. Starting from version 1.6.2 InvoicePlane supports the creation of eInvoices that can be compliant with the stardards set by the European Union.
The application provides CRM-like management for your clients. Enter contact details, notes or add custom fields. Basic project and task management is also available.
You can customize InvoicePlane to make sure it fits your needs: select from different themes, set amount formats, modify email and PDF templates or many more.
Let your clients pay the invoices by using different online payment providers like PayPal and Stripe (others coming soon)
InvoicePlane is translated into many languages by community members and more languages are coming soon.
InvoicePlane is driven by a large community who helps one another. The exchanges between the community happen on the InvoicePlane forum, on which help can be seeked ad given. Futhermore there is a Discord Community that is all about InvoicePlane. The mantainers of InvoicePlane are also active on the community forum and on the Discord Channels, so feel free to ask them any question on the project.
If the community finds about a bug, the issue gets moved to the Github repository. This is the place where the discussion becomes more tehcnical and the possible solutions about the problem get discussed.