Strypey@lightone @drequivalent microblog.pub is a micro-blogging app compatible with most of the others there via #ActivityPub. Wasn't that the criteria for inclusion on the main page?
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.