I wanted something like workerd + celld for untrusted Rust apps and couldn’t find anything that quite fit. That said, I got a lot of inspiration from workerd, celld, spin, and wasmcloud.
spared (spare-dee) runs Rust apps + SQLite in isolated WASM sandboxes. It lets you run many apps per server, and by packaging SQLite inside the sandbox, you get better isolation than running it on the host. This opens the door to running untrusted code on a single machine.
It's open source and runs on any VPS.
It's still early, and there's still a lot to build, but it feels like it's at a good place to share. Let me know what you think.