A new engine, called Freescape was merged to master. This is an engine for the earliest 3d-based games, which was later turned into the "3D Construction Kit". The first game from this family, Driller, is supported for DOS, Amiga and Atari ST versions. C64, Amstrad and ZX Spectrum support is in the plans.
The engine is pretty small, which is of course, understandable for the machines of that era. Currently, it is just 5,500 lines of code but will definitely grow.
However, being even such small, the engine author, Gustavo Grieco aka gu3 aka neuromancer, already added a high-res OpenGL rendering. What about Driller in 3840x2160?