Kotlin, Rust, Scala and vaguely Go. Swift benefit over Kotlin is that it easily interfaces with existing objective-c and C code. It also has deterministic garba

Kotlin, Rust, Scala and vaguely Go. Swift benefit over Kotlin is that it easily interfaces with existing objective-c and C code. It also has deterministic garbage collection through automatic reference counting which is better for interactive systems and maintaining low memory footprint. Since it is native code and doesn't have a complicated garbage collector it can be used like C to create libraries for other programming languages. This is impossible to do with Go and Kotlin. Compared to Rust it is considerably easier to learn. Go is probably easier to learn than Swift but Swift is a lot more expressive. You could do scientific computations in Swift but that would be cumbersome in Go since you can't easily define matrix, vector and point types yourself.