I've been collecting a list of sandboxing related projects as well, some lower level than others. I wish I had time to evaluate them all:

- https://github.com/jingkaihe/matchlock

- https://github.com/mishushakov/libkrun-go

- https://github.com/earendil-works/gondolin

- https://github.com/butter-dot-dev/bvisor

- https://github.com/amlalabs/amla-sandbox

- https://github.com/eryx-org/eryx

- https://github.com/containers/bubblewrap (not new)

- https://github.com/coplane/localsandbox

- https://github.com/sd2k/conch

- https://github.com/Gerharddc/litterbox

- https://github.com/finbarr/yolobox

- https://github.com/coventry/sandbox-codex

- https://github.com/osks/ctenv

- https://github.com/tianon/gosu

- https://github.com/colony-2/shai

- https://github.com/rcarmo/agentbox

- https://github.com/coder/httpjail

- https://github.com/bytecodealliance/componentize-py

- https://github.com/tursodatabase/agentfs

- https://github.com/always-further/nono

- (another list on HN Deno Sandbox: https://news.ycombinator.com/item?id=46876022)

- Did not check if any/all of these are here: https://github.com/arjan/awesome-agent-sandboxes