[hsn915]

There are two publicly available contenders: Odin and Zig.

Each one has its own way in which it deviates from C in a way that some people might not like. Odin is probably a lot closer to C than Zig. Zig tries to bring some of the more recent ideas into the low level programming space (compile time null checking, builtin "T or error" types, etc.

https://odin-lang.org/

https://ziglang.org/

Of course there are some other contenders, but having looked at them, either they are not even serious enough, or they deviate from C way too much, with GC, closures, etc.