Arbitrum is an Ethereum “Layer 2” blockchain, meant to layer on top of Ethereum and offer faster and cheaper transactions. They released an alpha of their new upgrade, which allows you to execute smart contracts using WebAssembly.
They have released four language SDKs to facilitate writing smart contracts that compile to WASM. Rust and C/C++ are to be expected, but they also released an SDK for the Brainfuck ( https://esolangs.org/wiki/Brainfuck ) language: