switching.social
Do you like Mario Kart? Do you like Libre software?
Then you might like #SuperTuxKart, which lets you race as various FLOSS mascots:
It includes story mode, time trial, local multiplayer, online multiplayer and lots of mods too.
It's available for Linux, Mac, Windows and Android.
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.