Keep your internet activity private and secure with a VPN on your Raspberry Pi. But which one to choose?

SD by Ei5di is Contest Logging Software for Amateur Radio which can be run on the Raspberry PI using ExaGear Desktop.

Dire Wolf Ham Radio "soundcard" software modem/TNC and APRS encoder/decoder

The Raspberry Pi makes a great low-power lightweight server for NFS (network file system), mail server, git server, and, of course, a web server.