Hardware & software:
- Atlas.co at https://www.atlas.co for free from Leo Laporte.
- Portal for Apple II at http://www.deater.net for free from Leo Laporte.
- LightDims for $7.99 (Amazon Affiliate Link) from Andy Ihnatko.
- Gaffers Tape for $13.99 (Amazon Affiliate Link) from Andy Ihnatko.
- Little Flocker at https://www.littleflocker.com for $14.99 from Rene Ritchie.