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Reusable Software Components

Reusable components facilitate interoperability in digital public services. They enable developers to build new applications and services more easily by using common specifications(EU Digital Identity Wallet, Once-Only Technical System, eID, eSignatory...), services (TestBed) or tool (Website Evidence Collector). Discover them!

Featured Content

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: 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: 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: 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
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

IN THE SPOTLIGHT

2025 digital public administration factsheets
Last update: 16/12/2025

Publication of the 2025 Digital Public Administration Factsheets

Discover the state-of-art of interoperability by country
Digital governmentInteroperable Europe policyObservatories
How to navigate the Portal webinar visual
28/01/2026
Virtual event

Webinar: How to navigate the Interoperable Europe Portal

Join this webinar to learn how to navigate the Portal and make the most of its key features. Through live demonstrations, participants will discover helpful spaces, advanced search options, and…
Collaboration
Wikimedia Foundation, CC Attribution-ShareAlike 4.0
Last update: 12/12/2025

XWiki supporting three hubs within the EDMO network

XWiki supporting three hubs within the EDMO network
CollaborationObservatories+2 topics

Latest News

Connected systems
Last update: 11/12/2025

DomiSMP 5.2 release

Release candidate of eDelivery Service Metadata Publisher (DomiSMP) version 5.2. This release is conformant with the eDelivery SMP profile based on the OASIS SMP 1.0 and OASIS SMP 2.0 specification.
eDelivery and eInvoicing
RACSEL
Last update: 09/12/2025

ITB in support of eHealth in Latin America and the Caribbean

The Interoperability Test Bed (ITB) was used in the fourth regional Connectathon held in San Salvador, El Salvador, in October 2025, to support 18 Latin American and Caribbean countries in strengthening their digital health systems.
eHealthReusable Software Components+3 topics
ITB
Last update: 26/11/2025

ITB v1.28.4 released

Release 1.28.4 of the Interoperability Test Bed software is now available.
ICTReusable Software Components+2 topics