Abstract: The HAL open archive (https://hal.archives-ouvertes.fr) is the common platform, shared by the French academic community, for the open access dissemination of the scientific production. At the beginning of 2017, it has disseminated more than 400 000 documents: published and not published documents (journal articles, conference papers, theses), images and videos. Since its creation in 2011, the Centre for Direct Scientific Communication (CCSD) has developed and maintained the platform. One of the goals of the CCSD has always been to develop the interoperability and to boost the archive, but also to offer to the researchers a fluid environment and workflow to help them with their different activities. That is why it has developed an application for the management of scientific conferences: Sciencesconf (https://www.sciencesconf.org/). The platform facilitates the different steps of the organization of a conference, from the submission of the communications until the edition of the proceedings, passing by the configuration of the reviewing and the program by topics. It also offers a set of features. Some of them are customizable by the administrators: appearance of the website, management of the registration and the submissions, automatic transfer of the acts to HAL. The hosting platform of epijournals, Episciences (http://episciences.org/) is a complete tool for managing journals focused on peer-reviewing and disseminating its contents. It also allows researchers and academic editing societies to try out an innovating model of open access publications: the author proposes its article by submitting it on an open archive (HAL but also arXiv, CWI) to one of the journals hosted on Episciences. Its manuscript is immediately in open access and, once accepted and published, the first version submitted in HAL is updated with the new version. Finally, Campus- AAR is a digital working environment project for the production, the description and the publication of audiovisual scientific archives. Its aim is to offer an expandable software infrastructure and a set of terminological resources allowing the holder of the archives to upload, to analyze, to show, to republish, to browse and to make interoperable the audiovisual resources. The videos are hosted and released on HAL. The poster will present these three applications and their interactions with HAL. Bio: Christine Berthaud is research engineer specializing in the field of scientific and technical information. She was responsible for the engineering Documentary department of the Institute of social and Humanities sciences from 1998 to 2011. She coordinated the project mobilizing the critical electronic edition of corpus in this institute and she is co-founder of the MUTEC project, it is a device sharing, accumulation and dissemination of technologies and methodologies that are emerging in the digital humanities. Since 2003, she operates in the field of open access, she was the responsible of HAL-SHS and deposits from the field of Humanities and Social Sciences in the HAL open archive. She coordinated the Scientific and Technical Committee established by the Protocol for a national and inter-institutional archive (2006-2008). Since April 2011, she is the director of the Center for Direct Scientific Communication CNRS unit dedicated primarily to open-archives and related platforms such as the peer review project : Episciences.org. She represents the CNRS at COAR.