Rokuro is a C# game engine using SDL, made as a master's thesis project.
As Rokuro is mostly a project made for educational purposes, I wouldn't recommended using it for any serious work. However, if you like to experiment with game engines and low-level games, feel free to take a look.
See the relevant wiki page.
轆轤 (ろくろ, rokuro) means "potter's wheel" in Japanese, though the word is also used in rokurokubi, a folklore creature with a long neck, a kind of monster one might see in a video game. I thought the name was fitting.