[aperrien]

Is it possible to download this for offline use? Or to view the source code for it?

[self]

You can run Smalltalk78 locally by cloning (or downloading) https://github.com/codefrau/Smalltalk78

Any web server that serves static files will do (like "python3 -m http.server").

To use the full Lively interface, start here: https://www.lively-kernel.org/development/