I-InvoicePlane uhlelo lokusebenza lwama-invoyisi lwamahhala nomthombo ovulekile. Le phrojekthi ingumlandeli osemthethweni kanye nomnikazi wekhodibase yenguqulo ye-FusionInvoice 1.x, eyabhalwa u-Jesse Terry. I-FusionInvoice yayiwumthombo ovulekile wesofthiwe ngaphambilini kodwa yaguqulwa yaba umkhiqizo wokuthengisa ngokukhishwa kwenguqulo 2.x. U-Kovah, umholi wephrojekthi ye-InvoicePlane, uthathe i-codebase futhi waqala kabusha iphrojekthi ngegama elisha: I-InvoicePlane.