JSNES 2.1.0 by Ben Firshman and contributors.
https://github.com/bfirsh/jsnes
Apache License 2.0. Unmodified browser distribution in jsnes/.
Full license: jsnes/LICENSE

Javatari 5.0.4 by Paulo Peccin and contributors.
https://github.com/ppeccin/javatari.js
GNU Affero General Public License v3; see javatari/LICENSE.
Corresponding upstream source: javatari/source-f954960.tar.gz
The upstream test/roms directory is excluded; no game ROMs are included.
Unmodified core. Garage adapter: javatari/bridge.js and ../atari-console.mjs.
The bridge and Atari adapter are distributed under AGPL-3.0 as well.

No commercial game ROMs are distributed with this site.
Garage Paddle and the cassette / karaoke demo melodies are original.