Nearcade

Nearcade is an open source game streaming platform. It functions as a self hosted alternative to Steam Remote Play Together, allowing you to share your screen and play local couch co-op multiplayer games with friends over the internet with low latency. Maintained by TheRealFame on GitHub, where it has earned 56 stars from the community.

It's actively developed around linux-app, linux-gaming, nodejs, and is a solid reference for anyone building with these tools.