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Last update: 29/02/2024

Quba e-invoice viewer

Open Source SoftwareBusiness and competition+3 topics
Last update: 10/11/2020

Mustangproject 2.0 to integrate e-invoice validator

Open Source SoftwareStandardisation+2 topics
Last update: 23/03/2020

Open-source E-invoice Validator

Business and competitionOpen Source SoftwareeProcurement
Last update: 14/03/2019

ZUGFeRD 2 now supports EN16931

Business and competitionTradeeDelivery and eInvoicing
Physical event

EuroFactura

Trade
Last update: 10/09/2018

Open-Source

eDelivery and eInvoicing
Last update: 13/06/2019

Open-Source

Business and competitionOpen Source SoftwareeDelivery and eInvoicing
Last update: 20/02/2024

Mustangproject

eProcurementeDelivery and eInvoicing
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e-invoicing

Business and competitionTradeeDelivery and eInvoicing
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eProcurement

eProcurement
Last update: 31/10/2025

Open Source Observatory (OSOR)

Open Source Software
Physical event

Open!2015

eProcurement