SuperTuxKart, one of the stalwarts of the open source gaming space has a fresh new release out with version 1.1.
This big update improves upon the online multiplayer feature, which itself is still quite new only being added in the big 1.0 release back in April. In this release the team said they've added support for IPv6 clients and servers, improved collisions handling, added a player reporting function, improved on some issues causing lag when playing online and they added "AI support to local networking servers".
Additionally there's some user interface improvements, the battle mode now has random spawn locations, a new Screen space reflection graphical effect was added, the Pumpkin Park arena is now available to everyone, there's enhancements to the mobile interface, complex text and emoji support plus a bunch of other improvements to the game as a whole.
On top of that they're also switching to a dual-license model, with both GPL and MPL being used which they say will allow them to expand to have a separated game engine and game, get onto Steam, the Apple store, game consoles and using libraries that aren't GPL compatible when needed. More on that can be found here.
You can see the full release announcement here.
I'm really glad SuperTuxKart not only exists, but continues to be developed. Still a little rough around the edges, but in the last couple years it's become quite a fantastic free racing game. Especially great for a younger audience, or to play with others and it can be a huge amount of fun.