hashcash
The solver can be embedded in a sandboxed iframe if has browser support, downloaded as offline html, userscript or browser extension. No frequent updates nor obfuscation so it could be as safe as the no log website.
fossil repos
wow, not distorted but if it has been in production for so long then I will use it and add more randomness.
Never thought I would miss this textboard for years.
grinding through the thread list for experience