InvoicePlane jẹ ọfẹ ati ohun elo risiti orisun ṣiṣi. Ise agbese na jẹ arọpo osise ati oniwun koodu koodu ti ẹya FusionInvoice 1.x, eyiti Jesse Terry kọ. FusionInvoice jẹ sọfitiwia orisun ṣiṣi ṣaaju ṣugbọn o yipada si ọja iṣowo pẹlu itusilẹ ti ẹya 2.x. Kovah, oludari iṣẹ akanṣe InvoicePlane, gba koodu koodu ati tun bẹrẹ iṣẹ naa pẹlu orukọ tuntun: InvoicePlane.