Don McCurdy"Signal is Expensive”, from CEO @Mer__edith, is very good. The transparency around infrastructure costs had me hooked from the start, but the ways they've rearchitected ubiquitous features (profile pictures, GIF sharing, finding contacts) to protect user privacy, that’s really stunning.
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.