Wasmtime
Wasmtime is a standalone wasm-only optimizing runtime for WebAssembly and WASI. It runs WebAssembly code outside of the Web, and can be used both as a command-line utility or as a library embedded in a larger application. Uses Cranelift for it's WebAssembly execution.
Server side runtimes for WebAssembly highlight the portability of WebAssembly. WebAssembly provides a compile target for multiple languages to be used in many different contexts. This also allows for some level of containerization of your application or library, due to the sandboxed nature of WebAssembly's linear memory, and Capability-based security model.
Wasmtime is a project under the Bytecode Alliance, an industry partnership coming together to forge WebAssembly’s outside-the-browser future by collaborating on implementing standards and proposing new ones.