Christine Lemmer-Webbermany younger people might not know of the greatest FOSS-doom hack/fork, which is psdoom, a version of Doom where you run around killing the processes on your own computer http://psdoom.sourceforge.net/
Jonkman Microblog is a social network, courtesy of SOBAC Microcomputer Services. It runs on GNU social, version 1.2.0-beta5, available under the GNU Affero General Public License.
All Jonkman Microblog content and data are available under the Creative Commons Attribution 3.0 license.