Free Software for WebAssembly
SurrealDB
SurrealDB is an innovative cloud database, suitable for serverless applications, JAMstack applications, single-page applications, and traditional applications.It reduces the development time of modern applications by simplifying your database and API stack, removing the need for most server-side components. Allowing you to build secure, performant apps quicker and cheaper. For a hassle-free setup, get started with SurrealDB Cloud in one-click.
AssemblyScript
AssemblyScript is a language designed for WebAssembly. AssemblyScript targets WebAssembly's feature set specifically, giving developers low-level control over their code. If you are familiar with TypeScript you will feel right at home as AssemblyScript is a variant of TypeScript that makes it easy to compile to WebAssembly without learning a new language.
Pyodide
Pyodide is a scientific Python stack that compiles to WebAssembly allowing you to run the Python 3.8 runtime to the browser via WebAssembly. With Pyodide you can run popular libraries such as NumPy, Pandas, Matplotlib, SciPy, and scikit-learn in any modern browser.
Wasmer