Reusable Software Components

Featured Content

Last update: 13/02/2024

Once-Only Technical System (OOTS)

The Once-Only Technical System (OOTS) streamlines data retrieval for cross-border procedures, enhancing trust, efficiency, and data exchange among EU public administrations and citizens. It is an EC solution.

Collaboration

Last update: 08/09/2025

eDelivery

Secure, interoperable data/document exchange across EU borders using AS4 Access Points, promoting vendor-neutral, reliable, and scalable communication for public administrations and businesses. It is an EC solution.

Reusable Software ComponentseDelivery and eInvoicing

Last update: 13/02/2024

eID

The eID Building Block enhances cross-border digital services in the EU by enabling secure electronic identification and transactions in compliance with the eIDAS Regulation, promoting interoperability, trust, and security. It is an EC solution.

Reusable Software ComponentseIdentity and eSignature

Last update: 24/04/2024

EU Digital Identity Wallet

The European Digital Idenity Framework harmonizes authentication to digital services and enables sharing relevant identity data for citizens and businesses.

SemanticsOpen Source Software+2 topics

Last update: 08/08/2025

Interoperability Test Bed

Interoperability Test Bed tests the interoperability and the conformance of your digital services. It is a free service and a reusable OSS. It is an EC solution.

ToolsOpen Source SoftwareICT

Last update: 29/10/2025

Website Evidence Collector

Website Evidence Collector is an OSS (under EUPL), streamlines privacy inspections of websites, gathering evidence like cookies, and external requests. It is an EU solution (EDPS).

ICT securityOpen Source SoftwareReusable Software Components

Last update: 13/02/2024

eSignature

The DIGITAL eSignature Building Block enables electronic signatures in compliance with the eIDAS Regulation, supporting secure, cross-border digital interactions for public services, businesses, and citizens. It is an EC solution.

Reusable Software ComponentseIdentity and eSignature

Last update: 13/02/2024

eInvoicing

The eInvoicing Building Block boosts EU eInvoicing, adhering to EU standards for economic benefits. It aids public/private sectors in digital transition, offering support services for smooth adoption of eInvoicing. It is an EC solution.

Reusable Software ComponentseDelivery and eInvoicing

Last update: 16/02/2024

eTranslation

eTranslation is a machine translation tool that helps public administrations and businesses exchange information and documents across all official EU languages, Icelandic and Norwegian.

Languages and translation

IN THE SPOTLIGHT

Last update: 24/11/2025

CERN report highlights open source software contributions

CERN released its first Open Science report, sharing progress on the implementation of its 2022 Open Science Policy. The report highlights CERN’s commitment to ensuring scientific knowledge is shared, and how open source contributes to this mission.

Open Source SoftwareICTScience and technology