- ASM.js: A faster, cut down version of JavaScript - WebAssembly: The successor to ASM.js, a compiled binary format (as opposed to plain text) with additional

- ASM.js: A faster, cut down version of JavaScript - WebAssembly: The successor to ASM.js, a compiled binary format (as opposed to plain text) with additional features - languages built on top of WebAssembly: More like languages that can be compiled to the WebAssembly binary format. currently C/C++ - assemblyscript: A subset of a languange (TypeScript) that compiles to JavaScript, but which compiles to WebAssembly instead.