Julien Deswaef (moved)https://delta.chat/en/features is an email client that looks like a #chat app.
As they say, "Delta Chat is the messenger with the largest userbase in the world"
Only available on @fdroidorg
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.