Berkeley has this really cool program called BOINC that you can download and donate your computer’s resources to processing scientific data. There are a bunch of projects to pick, from working on climate change, to cancer, to the Large Hadron Collider.
The good folks at linuxserver.io even have a ready to go Docker container for easy setup: https://hub.docker.com/r/linuxserver/boinc
Another possibility is running the Archive Team’s Warrior, which downloads data from at risk web sites and uploads them to the Internet Archive: https://wiki.archiveteam.org/index.php/ArchiveTeam_Warrior
Does anyone else have examples of projects like this? My dream is for the Fediverse to have this sort of feature eventually.
Now I know this is being done with encryption, but an open tunnel direct to your non dmz-ed system, is just begging to be hacked, and it will be, without a shadow of doubt.