lilith — POSIX-like x86-64 kernel and userspace written in Crystal. The Crystal language is statically typed with compile-time checks for null references, a concurrency model, C bindings, and Ruby-like syntax. This is the first UI I’ve seen in it.
Wenyan — an esoteric programming language that closely follows the grammar and tone of classical Chinese literature. Useless and incomprehensible to me, but a notable experiment. I see plenty of Chinese-language projects on GitHub now, often trending, and I feel like English’s position as the tech de facto lingua franca can no longer be presumed for the next decade.