https://www.fsf.org/blogs/community/libreplanet-cfs-closing-very-soon-submit-today/
The LibrePlanet event has a call for papers open until this Monday.
LibrePlanet is run by the Free Software Foundation. If you’re reading this forum or using Plone, this event is about and for software and communities like ours 
Note: fsf.org is Plone 