We started to provide forge.scilab.org eight years ago intending to maintain Scilab toolboxes as projects with source code and bug reports. This was supposed to ease the maintenance and delivery of high-quality toolboxes. This required us to provide a reliable service and extra IT work out of Scilab development.
After Github.com and Gitlab.com successes, the needs of a forge dedicated to Scilab are not present anymore. Projects can be hosted and referenced with ease; these websites have high availability and extra services that we cannot provide.
Beginning today, all projects are migrated to a GitLab sub-project  and will remain accessible from there. If needed, request the access to write on your repository (from the GitLab interface) or migrate it somewhere else. The forge server is still up for now but will be discarded soon.