Such portals are great for transient volunteer opportunities. But there are also open source projects with a more constant need for contributors in these differ

Such portals are great for transient volunteer opportunities. But there are also open source projects with a more constant need for contributors in these different areas, and I don't think you will find them listed there. For example these are all large-ish projects that have a lot of non-code requirements and also provide support for new volunteers: https://www.gnome.org/get-involved/ https://www.gnome.org/get-involved/ https://www.libreoffice.org/community/get-involved/ https://www.libreoffice.org/community/get-involved/ https://fedoraproject.org/wiki/Join https://fedoraproject.org/wiki/Join https://www.mozilla.org/en/contribute/ https://www.mozilla.org/en/contribute/