NZ Open Source Society has been running a number of services using various free code server packages, with hosting provided gratis by CatalystCloud.nz, and has been offering gratis use of these services to those affected by COVID-19:
Note particularly the instance of Big Blue Button, which I’ve heard from a number of quarters performs significantly better for voice/ video conferences than self-hosted Jitsi Meet. Anyone is welcome to drop into the Community Room mentioned in the link above to give it a quick test. That room is hosted by Dave, NZOSS President, who lurks in it whenever he is online. If you want to schedule a group test, let me know, and I can create a temporary private room for that.