Collabora announced that their open source XR runtime (VR / AR) Monado has made some serious waves in the industry, and is now the foundation for many vendors.
The developers working away on the Infinity Engine open source remake GemRB just released v0.9.5, bringing major classic RPG compatibility improvements.
D7VK v1.6 is another impressive sounding release for the Direct3D 3, 5, 6 7 to Vulkan translation layer bringing further compatibility improvements for Linux.
GE-Proton 10-34 has arrived bringing even more gaming fixes for Linux / SteamOS, so here's all you need to know for the community-run compatibility layer.