Crater
From NixOS Wiki
Crater is a web application for managing invoices, clients and payments.
Installation
To setup Crater locally, this is the most minimal configuration to get started
/etc/nixos/configuration.nix
services.crater.enable = true;
After that Crater will be available at http://localhost . Complete the setup by choosing your default language and setting up your user profile.
See also
- Invoiceplane, alternative self-hosted invoicing application