OpenSDMX provides components that can be used in every context where SDMX is implemented. SDMX is a model and ISO standard for organizing and exchanging statistical data. OpenSDMX produces SDMX data and metadata in a RESTful way.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.