ROSInE
Open Source Invoice Programm for Egroupware
Please use the new git repository on github:
https://github.com/sneakyx/rosine
See also full docker image under: https://hub.docker.com/r/sneaky/egroupware-extended/
This is a fork of php Rechnung also known as PHP Invoice by (Edy Corak).
It fits neatly in Egroupware and uses the Egroupware address book (no secondary addressbook nessesary).
You can write invoices and offers and can also manage articles.