Welcome to our junkyard!
This is our page on GitHub, which is used for mirroring some of the repos from our main page on GitLab so if you wanna open an issue for some of the repos you better do that there
We are currently working on the GoldSrc engine reimplementation here and its upgraded version (something similar to Source Engine but following its own "evolution" path) here
We also have our own reimplementation projects for both the engine SDK and the game code, which are GPL-licensed and compatible with the engine reimplementations
There is also an attempt to reimplement the VGUI2 library and its controls/widgets code to make that functionality accessible to game/mod developers